Amino Acid doser

[Danh Ngo]

Hi @Randy Holmes-Farley ,
I read some thread said we can mix AA with distilled vinegar for auto doser. I tried to mix Korallen-Zucht AA with distilled vinegar to have correct dosage. But recently I noticed some black stuff in the bottle, stringy, does it mean the AA is degrading?

 

[Randy Holmes-Farley]

Probably bacterial growth, which is a risk of diluting such products and keeping them at room temp.

 

[Danh Ngo]

Probably bacterial growth, which is a risk of diluting such products and keeping them at room temp.

is it still ok to use? Or I should change it