I frequently take a wort sample, just before pitching, put it in a test tube and put it in a warm, dark place for 2-4 days to check for obvious haze development. If any appears it is usually a sign of bacterial growth.
Problem. Two days ago I did this and when I popped the lid off the tube it gushed out a bit and at the bottom of the tube appeared to be nucleation bubbles arising just as if there was CO2. But this was before pitching. There is a little sediment on the bottom of the tube. Smells and tastes like wort recipe. Nothing unusual.
Question 1: When force testing wort, do you usually leave access to air (maybe a somewhat loose tin foil cover, or was my method with a screw on cap prefereable and why? [ I noticed today that DeClerck suggests putting a cotton ball in the top - so maybe it needs air to test properly?]
Question 2: Why gushing? Just enough to overflow the tube for a few seconds, not like fusarium in a beer where the bottle never stops gushing. More like beer foam for about 20 seconds. What could be the cause? Bacteria? Mold (post boil?) Gremlins?
Any ideas are welcome.
Mark
Hidden Well Brewery
Problem. Two days ago I did this and when I popped the lid off the tube it gushed out a bit and at the bottom of the tube appeared to be nucleation bubbles arising just as if there was CO2. But this was before pitching. There is a little sediment on the bottom of the tube. Smells and tastes like wort recipe. Nothing unusual.
Question 1: When force testing wort, do you usually leave access to air (maybe a somewhat loose tin foil cover, or was my method with a screw on cap prefereable and why? [ I noticed today that DeClerck suggests putting a cotton ball in the top - so maybe it needs air to test properly?]
Question 2: Why gushing? Just enough to overflow the tube for a few seconds, not like fusarium in a beer where the bottle never stops gushing. More like beer foam for about 20 seconds. What could be the cause? Bacteria? Mold (post boil?) Gremlins?
Any ideas are welcome.
Mark
Hidden Well Brewery
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