No lab and no tasting panel. What this page can do is read every figure the maker publishes, check those figures against each other, and say where they stop agreeing.
By Scooter M.·Published September 17, 2026 · Updated September 19, 2026
The short answer
Buy the gallon SCOBY if you already own a jar, and the Complete kit if you own nothing. Fermentaholics publishes the single most checkable figure any culture seller on this site offers — starter tea volume in fluid ounces, set against its own stated ten percent rule — and it holds that ratio across every culture size it sells. What it does not publish is a shelf life in advance, a pH for the starter tea it says it monitors, the ratio inside its tea blend, or a single jar dimension.
How this review works, and what it is not
This site has not brewed with these cultures and does not claim to have. A review of a live culture that pretends otherwise is guessing at the one thing nobody can see before it arrives: whether that particular pellicle, in that particular bag, survived the trip.
What can be checked in advance is the paperwork. Fermentaholics sells through its own store and through Amazon, and publishes contents lists, starter tea volumes, ingredient statements, certifications and a description of how its cultures are produced and packed. Every figure on this page comes from those published listings, read on the maker's own product pages and on the live Amazon listings on 2026-09-17. Where two of those sources disagree, the page says so instead of picking one.
The standard applied is the same one used across this site. A published number beats a marketing adjective. A number that can be checked against another number beats one that cannot. And a gap is recorded as a gap, not filled in.
The number that holds up
Plenty of culture listings describe the liquid that ships with a pellicle only as "starter liquid", with no quantity attached. Fermentaholics gives a volume, and separately publishes the rule it expects you to use: roughly ten percent starter tea per batch. That combination matters because the two figures can be checked against each other, and a seller that publishes both is inviting the arithmetic.
Published starter tea volumes, from the maker's product pages and live Amazon listings, 2026-09-17. Share of batch is calculated here, not published.
Product
Batch size
Starter tea published
Share of batch
Certification stated
Organic Kombucha SCOBY
1 gal (128 oz)
12 fl oz (1.5 cups)
9.4%
USDA Organic, Kosher
Kombucha SCOBY, half gallon
64 oz
6 fl oz (0.75 cups)
9.4%
USDA Organic, Kosher
Jun Kombucha Starter Culture
1 gal (128 oz)
12 fl oz
9.4%
USDA Organic, Kosher
Complete Kombucha Brewing Kit
1 gal (128 oz)
12 fl oz with pellicle
9.4%
USDA Organic, OU Kosher
Every culture lands at the same 9.4 percent. Twelve ounces against a gallon, six ounces against a half gallon, twelve again for jun. That is within a rounding error of the stated ten percent rule, and — the detail that earns the trust — it stays there when the batch size changes. A seller that simply relabeled one bag would ship the same pour for a half gallon as for a gallon. This one halves the liquid when it halves the batch, which is what measuring looks like from the outside.
Why it matters for a buyer: the starter tea, not the rubbery disc, is what drops a fresh batch of sweet tea to an acidity where mold cannot establish. A pellicle arriving in a splash of liquid is a weaker start than one arriving in a measured tenth of the batch. What a SCOBY actually is goes further into why the liquid does most of the work.
What it says about production
Beyond the volumes, Fermentaholics publishes a short account of how its cultures are made and packed. None of it can be verified from outside, and none of it is a certification in itself, but it is specific enough to hold the maker to.
Where they are grown. Cultures are stated to be propagated in a "lab-controlled environment" and grown in the maker's "fully licensed lab".
Selection. Once mature, each culture is stated to be inspected by hand, with only those meeting the maker's standards shipped.
Packing. Cultures ship in thick, tear-resistant food-grade bags filled with certified organic starter tea, then placed inside a second bag.
Traceability. Each package is stated to carry a batch number and a best-by date. This is the most useful claim on the list, because it gives you something concrete to quote if a culture arrives wrong.
Ingredients. The starter tea is published as organic cane sugar, filtered water, organic black tea and live cultures. Almost no culture seller lists what the liquid is made of.
The picks
Which Fermentaholics product to buy first
The culture is what this maker does best. The kit is for anyone starting from an empty cupboard, and the tea blend is the repeat purchase that follows either one.
Fermentaholics
Organic Kombucha SCOBY with 12 fl oz Starter Tea
A hand-selected pellicle with twelve fluid ounces of mature starter tea, measured against the maker’s own published ten percent rule for a gallon.
Twelve fluid ounces of mature starter tea with the pellicle, measured against the maker’s own published ten percent rule — the fullest kit of the group.
A black and green blend formulated for kombucha specifically, published at twenty-two gallons from an eight-ounce pouch — the best yield-per-dollar on this page.
The gaps are as consistent as the strengths, and each one is a figure a careful buyer would reasonably want.
No shelf life published in advance. The best-by date is printed on the package, which means you learn how long the culture keeps after it has arrived. For a live product that is usually fine. For someone deciding whether to order a week before a trip, it is not.
No starter tea pH. The maker states its process ensures "balance, pH, and strength", and then publishes no pH figure. That is the one number that would let a buyer check acidity on arrival against something the maker committed to. Finished kombucha sits at roughly 2.5 to 3.5, and pH testing covers what a healthy starter should read.
No blend ratio. The Organic Kombucha Tea Blend is published as black and green loose leaf, eight ounces, with a stated yield of twenty-two gallons. That works out to a little over a third of an ounce per gallon. How much of the blend is black and how much is green is not stated, and neither origin nor grade is named for either leaf.
No jar dimensions. The kit jar is described as American-made, lead-free glass. No height, mouth diameter or footprint is published for it or for the plain gallon jars sold separately — and mouth diameter is the measurement that decides whether a hand fits in to lift the pellicle out. One-gallon jars compared records which makers publish it and which do not.
There is also one outright inconsistency, and it is on the maker's own page. The Essentials Kombucha Brewing Kit is described twice. The short product summary lists a plain gallon jar, a muslin cover and band, an organic SCOBY and an adhesive thermometer. The detailed contents list further down the same page adds twelve ounces of starter tea and a fifteen-count matchbook of acid-range pH strips, and the current Amazon listing for the Essentials kit names pH strips in its title. Whichever version you are looking at, read the contents list on the exact listing you buy from before you rely on strips being in the box.
Choosing inside the line
Fermentaholics sells more than five things, but a kombucha or jun brewer is realistically choosing between these five, and the right one depends almost entirely on what is already in your kitchen.
You own a gallon jar. Buy the gallon SCOBY and a bag of the tea blend, and use sugar from the cupboard. It is the cheapest complete route in the line, and the jar is the part of any kit you would be paying for twice.
You own nothing. Buy the Complete Kombucha Brewing Kit. As published, it puts the culture, the jar, tea, organic cane sugar, a reusable tea bag, an adhesive thermometer, pH strips and a pipette in one box, which is everything a first batch needs before bottling. Bottles are not included, and nothing in it can hold carbonation.
You want to try it small. The half-gallon SCOBY ships six ounces of starter tea for sixty-four ounces of batch, at the same ratio as the gallon. A smaller volume of liquid swings with room temperature faster, so it is less forgiving on a cold night.
You want jun. Buy the jun culture rather than feeding a kombucha SCOBY honey. It ships twelve ounces of starter tea and is fed green tea and honey, not black tea and cane sugar. How to make jun covers the method.
The picks
The other two
Jun is a different culture, not a variation on kombucha. The half gallon is the same culture as the gallon, dosed correctly for a smaller jar.
Fermentaholics
Jun Kombucha Starter Culture, 12 fl oz
A jun pellicle with twelve fluid ounces of pre-measured mature starter tea — the culture on its own, for anyone who already owns a gallon jar.
The same organic culture line dosed for half a gallon — three quarters of a cup of starter tea with a pellicle, which is the right amount for a smaller jar.
Three culture sellers appear across this site, and they are good at different things.
What each seller publishes, compared on documentation rather than marketing. Compiled from the sellers' published listings.
Seller
Quantities published
Method published
Biggest gap
Fermentaholics
Yes — starter tea in fl oz at every size, 10 percent rule
Partly: kit instructions, the dosing rule
No shelf life or starter pH published
The Kombucha Shop
Yes — starter tea in cups, kit contents
Partly: kit instructions
No jar dimensions anywhere
Cultures for Health
Partly — water kefir yes, milk kefir no
Extensively: ratios, temperatures, cycles, shelf life
Nothing kombucha-specific
Fermentaholics publishes the best quantities. The Kombucha Shop states that its cultures ferment for a minimum of six weeks before shipping and ships one cup of starter tea with its gallon kit — eight ounces, or about 6.3 percent of a gallon, which works but leaves less margin in a cool room. Cultures for Health publishes the best method, but for kefir rather than kombucha.
For a kombucha or jun buyer that resolves simply. The seller that tells you how much starter tea is in the bag, and scales it when the batch changes, is the one whose culture you can check on arrival. For kefir, the Cultures for Health review covers the seller whose instructions go deepest.
What to check the day it arrives
Because the useful claims here are specific, they are also checkable, and the first ten minutes with the package are when to do it.
The label. A batch number and a best-by date should both be on the bag. If they are not, the package does not match what the maker publishes, and that is worth an email before you brew with it.
The volume. Twelve ounces is a cup and a half. It is easy to eyeball against a measuring cup, and a bag noticeably short of it is a reasonable thing to report.
The smell. Mature starter tea smells sharply sour, like a mild vinegar. Sweet or neutral liquid has not acidified, which is the one property the starter exists to provide.
The acidity, if you have strips. A strong starter reads well down in the acidic range. If you are not brewing immediately, a SCOBY hotel keeps it working until you are.
The other maker in that table gets the same treatment. The Kombucha Shop, reviewed on what it publishes reads its kits and cultures against their own contents lists, and sets its one-cup starter pour beside the 12 fl oz measured here.
Heads up: some links on this page are affiliate links. If you buy through one we may earn a commission at no extra cost to you. It never changes a ranking, and we take no payment for placement. The full version.
The short answer
Quick picks
Ranked on the published rubric. Every row jumps to that product's full write-up below; the button goes straight to Amazon.
#
Product
Best for
Score
Price
1
Fermentaholics
Organic Kombucha SCOBY with 12 fl oz Starter Tea
A hand-selected pellicle with twelve fluid ounces of mature starter tea, measured against the maker’s own published ten percent rule for a gallon.
Twelve fluid ounces of mature starter tea with the pellicle, measured against the maker’s own published ten percent rule — the fullest kit of the group.
A black and green blend formulated for kombucha specifically, published at twenty-two gallons from an eight-ounce pouch — the best yield-per-dollar on this page.
The same organic culture line dosed for half a gallon — three quarters of a cup of starter tea with a pellicle, which is the right amount for a smaller jar.
Fermentaholics Organic Kombucha SCOBY with 12 fl oz Starter Tea
A hand-selected pellicle with twelve fluid ounces of mature starter tea, measured against the maker’s own published ten percent rule for a gallon.
Who it is for. Anyone starting a standard one-gallon batch who wants the starter tea measured for them.
Published specifications
Batch size
One gallon
Starter tea volume
12 fl oz of mature, active starter tea
Pellicle
Hand-selected
Starter tea ingredients
Organic cane sugar, filtered water, organic black tea, live cultures
Certification
USDA Certified Organic, Kosher, Non-GMO, vegan
Production
Grown in the maker’s licensed lab
Maker’s dosing rule
“the rule of thumb is to use 10% starter tea per batch size”
Source: Fermentaholics published SCOBY specification (12 fl oz starter tea, 1-gallon dosing, ingredients, certifications) and its published 10 percent starter rule, retrieved 2026-09-01
Rubric — 8.5 / 10
Materials9/10 · weight 28%
Documentation9/10 · weight 22%
Capacity fit8/10 · weight 16%
Cleaning8/10 · weight 18%
Value8/10 · weight 16%
What it gets right
12 fl oz against a 128 oz gallon is 9.4 percent, within a rounding error of the maker’s own 10 percent rule — the quantity matches the instruction
Starter tea is the part that actually acidifies a new batch and protects it from mold; the pellicle is mostly a raft
Ingredients of the starter tea are published, which almost no culture seller does
Certified organic, kosher, non-GMO and vegan are stated together
What it costs you
A live culture in transit is a live culture in transit — heat and delay are real risks nobody controls
No stated shelf life once it arrives
You still need tea, sugar and a jar
Skip it if. You are brewing half a gallon. Buy the half-gallon version instead; a gallon’s worth of starter in a half-gallon batch drives the acidity too far, too fast.
Twelve fluid ounces of mature starter tea with the pellicle, measured against the maker’s own published ten percent rule — the fullest kit of the group.
Who it is for. Someone who wants the culture to be the strongest part of the kit rather than the jar.
Published specifications
Batch size
1 gallon
Culture
Kombucha starter culture: pellicle plus 12 fl oz of mature starter tea, measured for a 1-gallon batch
Jar
1-gallon brew jar
Tea and sugar
Tea blend, organic cane sugar, reusable cotton tea bag
Measurement gear
Adhesive thermometer, pH strips, pipette
Cover
Cotton cloth cover and rubber band
Certification
USDA Certified Organic; also stated Kosher, Non-GMO and vegan
Starter tea ingredients
Organic cane sugar, filtered water, organic black tea, live cultures
Documentation
Detailed instructions and a flavoring guide
Source: Fermentaholics published kit contents and culture specification, fermentaholics.com/product/the-complete-kombucha-brewing-starter-kit/, retrieved 2026-09-01
Rubric — 8.0 / 10
Materials8/10 · weight 28%
Documentation9/10 · weight 22%
Capacity fit8/10 · weight 16%
Cleaning7/10 · weight 18%
Value8/10 · weight 16%
What it gets right
12 fl oz against a 128 oz gallon is 9.4 percent, within a rounding error of the maker’s own 10 percent rule — the quantity matches the instruction
Both instruments a first batch needs, thermometer and pH strips, are in the box
The starter tea’s ingredients are published, which almost no culture seller does
USDA Organic, Kosher, Non-GMO and vegan claims are all stated together rather than implied
What it costs you
No jar dimensions published
The jar is plain glass with no volume markers, so the 10 percent reserve is a judgment call
Nothing in the kit addresses bottling — you finish the batch with nowhere to put it
Skip it if. You want to bottle at the end of week one. Nothing here holds pressure; budget for swing-top bottles at the same time.
A black and green blend formulated for kombucha specifically, published at twenty-two gallons from an eight-ounce pouch — the best yield-per-dollar on this page.
Who it is for. Anyone who wants the tea question settled cheaply and permanently, and who would rather spend attention on temperature and timing.
Published specifications
Blend
Organic black and green tea, loose leaf
Weight
8 oz
Published yield
“Makes 22 Gallons of Kombucha”
Certification
USDA Certified Organic, OU Kosher
Formulation claim
“Specially Formulated to Keep Your Culture Happy and Nourished” — “a Balanced Diet For Active Yeast and Bacteria”
Instructions
“Easy to Follow Kombucha Brewing Instructions printed on the resealable pouch”
Packaging
Resealable pouch
Shipped weight
0.5 lb
Source: Fermentaholics published Organic Kombucha Tea Blend listing (organic black and green loose leaf, 8 oz, stated 22 gallon yield, USDA Organic and OU Kosher, instructions printed on the resealable pouch, 0.5 lb shipped weight), Amazon B07664WTY9, retrieved 2026-09-13
Rubric — 8.6 / 10
Materials9/10 · weight 28%
Documentation9/10 · weight 22%
Capacity fit9/10 · weight 16%
Cleaning7/10 · weight 18%
Value9/10 · weight 16%
What it gets right
Twenty-two gallons from one eight-ounce pouch is roughly five months of weekly gallon batches, which makes the cost per batch trivial
A black-and-green blend is the safe default: black feeds the culture reliably, green lightens the result, and you are not choosing between them
Brewing instructions printed on the pouch itself means the ratio survives after the box is thrown away
USDA Organic and OU Kosher are both stated, and the maker is the same licensed operation behind the cultures on this site
What it costs you
The blend ratio is not published — you know it is black and green, not how much of each
No origin or grade is stated for either leaf, so you are buying the maker’s formulation rather than a named tea
Loose leaf means you need a strainer, a bag or a funnel with a mesh insert at brew time
One flavor direction. If you want to taste a specific single-origin leaf in the finished drink, a blend is the wrong purchase
Skip it if. You want to control the leaf yourself. A blend formulated for you is the opposite of that, and a single-origin black tea is the page to buy instead.
Fermentaholics Jun Kombucha Starter Culture, 12 fl oz
A jun pellicle with twelve fluid ounces of pre-measured mature starter tea — the culture on its own, for anyone who already owns a gallon jar.
Who it is for. A kombucha brewer with a spare jar who wants to try jun without buying a second set of hardware.
Published specifications
Culture
USDA Certified Organic jun SCOBY
Starter tea volume
12 fl oz
Batch size
“Makes 1 Gallon”
What ships
“pre-measured strong, mature liquid starter tea packaged with a starter pellicle”
Feedstock
Green tea and honey, not black tea and cane sugar
Certification
USDA Certified Organic, Kosher
Production
“grown in our fully licensed lab”
Shipped weight
0.5 lb
Jar
None. This is the culture only
Source: Fermentaholics published Jun Kombucha Starter Culture listing (organic jun SCOBY, 12 fl oz pre-measured mature starter tea with a starter pellicle, makes 1 gallon, green tea and honey feedstock, USDA Organic and Kosher, licensed lab, 0.5 lb shipped weight), Amazon B01NADMSEJ, retrieved 2026-09-13
Rubric — 8.4 / 10
Materials9/10 · weight 28%
Documentation8/10 · weight 22%
Capacity fit8/10 · weight 16%
Cleaning8/10 · weight 18%
Value9/10 · weight 16%
What it gets right
Twelve fluid ounces against a 128 oz gallon is 9.4 percent, which lands on the same ten percent starter rule the maker publishes for its kombucha cultures
It is the culture on its own, so it costs a fraction of the jun kit if you already own a gallon jar
A jun culture bought as a jun culture is the only reliable way to get one — feeding a kombucha SCOBY honey weakens it rather than converting it
Same licensed lab and the same organic and kosher certification as the maker’s kombucha line
What it costs you
You still need a jar, a cover, a band, green tea and honey before anything ferments
Honey is meaningfully more expensive per batch than cane sugar, and jun wants a lot of it
A live culture in transit is a live culture in transit — heat and delay are risks nobody controls
No shelf life is published once it arrives
Skip it if. You own no gallon jar. The Essentials jun kit bundles the same culture with the jar, cover and band for not much more.
Fermentaholics Organic Live Kombucha SCOBY, Half-Gallon Batch
The same organic culture line dosed for half a gallon — three quarters of a cup of starter tea with a pellicle, which is the right amount for a smaller jar.
Who it is for. A cautious first-timer, or anyone testing whether they will actually drink the stuff before committing a gallon of tea.
Judged on what it publishes, it is the most checkable kombucha culture seller this site has sourced from: a starter tea volume in fluid ounces, a stated ten percent dosing rule it actually meets at every culture size, published starter tea ingredients, and a batch number and best-by date on each package. This site has not brewed with its cultures and does not claim to have tested them.
How much starter tea comes with a Fermentaholics SCOBY?+
Twelve fluid ounces, or a cup and a half, with the one-gallon SCOBY. The half-gallon SCOBY ships six fluid ounces, three quarters of a cup. The jun culture also ships twelve fluid ounces for a gallon. All three work out to 9.4 percent of their batch, within a rounding error of the maker's own ten percent rule.
Where does Fermentaholics grow its cultures?+
The maker states its cultures are propagated in a lab-controlled environment and grown in its fully licensed lab, inspected by hand once mature, and shipped double-bagged in food-grade bags of certified organic starter tea. Those are published claims rather than independently verified ones, but they are specific, and the batch number on each package makes them checkable.
Does the Fermentaholics Essentials kit include pH strips?+
The maker's own page lists it both ways. The short summary names a gallon jar, cover, band, organic SCOBY and adhesive thermometer; the detailed contents list on the same page adds twelve ounces of starter tea and a fifteen-count matchbook of acid-range pH strips, and the current Amazon listing names pH strips in its title. Read the contents list on the exact listing you buy from before relying on them.
Fermentaholics or The Kombucha Shop?+
On published documentation, Fermentaholics states more starter tea per gallon — twelve ounces against The Kombucha Shop's one cup, which is eight — and scales it by batch size. The Kombucha Shop states its cultures ferment for at least six weeks before shipping and ships a kit with pH strips, a pipette and a temperature gauge. Both are real culture houses; the larger measured pour gives more margin in a cool room.
How long does a Fermentaholics SCOBY keep before brewing?+
The maker does not publish a shelf life in advance. Each package carries a best-by date, so the answer arrives with the culture. Open it the day it lands, brew within that date, and if you cannot brew soon, keep it working in a SCOBY hotel rather than leaving it sealed in the bag.
Sources
Every specification cited on this page came from one of these documents, retrieved on the date shown against the product it belongs to.
Three starters from one maker, compared on published activation windows, ratios and shelf life — and an honest account of where the documentation ends.