Sourdough Starter Fails The Float Test? Why & How To Fix It
Sourdough Starter Fails The Float Test? Fix It Fast.
Drop a spoonful in water and it sinks? That means not enough gas trapped yet — too young, too weak, or past peak. Let's get it to float.
Get A Starter That Passes →Why it sinks instead of floats
What float test really is: Spoonful should float because it's full of CO2 bubbles. If it sinks, it's not airy enough to leaven bread yet. Fix strength first.
The Easy Solution: A Starter That Floats At Peak
Squirrelly Girl Starter is a mature bakery culture from Squirrelly Girl Sourdough — selected because it doubles, holds bubbles, and passes float test at peak.
- Passes when ready: Doubles in 4-8 hours and floats at peak — not 14 days guessing.
- Holds structure: Thick, bubbly, traps gas instead of sinking.
- Clear peak timing: Domed top, doubled, yeasty smell — easy to know when to test.
- 100% Activation Guarantee: Follow included guide. If it doesn't activate, we replace or refund.
- Keep it forever: Once active, same feeds keep it float-ready.
Free worldwide shipping • Dehydrated for freshness • Includes step-by-step guide
How To Pass Float Test In 3 Steps
Keep 25g starter. Feed 40g unbleached all-purpose + 10g whole rye + 50g filtered water. Thick like peanut butter.
Warm spot, wait for domed top and doubling 4-8 hrs after feed. That's peak — not before, not after fall.
Glass of room temp water. Gently drop small spoonful (don't stir or smash bubbles). Should float 10+ seconds. If sinks, feed again 12 hrs.
If after 14 days of thick warm feeds it still sinks and never doubles in 8 hours, culture is too weak. Switch to Squirrelly Girl Starter.
People Also Ask
Why does my sourdough starter fail the float test?
Not enough CO2 trapped — too young, too weak, too cold, or tested past peak when gas escaped. Feed thick 1:2:2 at 75-80F and test at peak doubling.
Can I use starter that fails float test?
Not for bread — won't rise well. Keep feeding until it doubles in 4-8 hrs and floats. You can use discard for crackers/pancakes, but not bread yet.
Is float test accurate?
Helpful guide, not 100%. Best signs are doubling in 4-8 hrs, bubbly throughout, yeasty smell. Some strong starters pass without float if degassed. If fails + no double, needs more strength.
When should I do float test?
At peak — when doubled, domed on top, bubbly, 4-8 hours after feeding at 75-80F. Not right after feeding, not after it fell.
Floats = Ready To Bake.
Get the strong bakery culture that doubles, floats, and bakes beautiful bread.
Get Squirrelly Girl Starter — $19.99 US →Free worldwide shipping from Princeton, BC, Canada • Real support from real bakers
Our 100% Activation Guarantee
Zero Risk. Zero Guesswork. Just Real Sourdough.
Bake or Get Covered: If your starter fails to activate into a bubbly, active, bake-ready culture.
We’ll either send you a fresh replacement batch completely free or issue a 100% refund.
No hoops to jump through, no complicated returns, and no hard feelings.