AFR Growth in Container

[saltypilot]

Has anyone seen a mold/fuzzy like growth in the bottom of their AFR mixture?
I recently noticed this in my AFR dosing container…

 

[Tahoe61]

It's likely a bacterial mass.

 

[Randy Holmes-Farley]

Did you dilute it at all?

In full strength AFR, the potential for growth of bacteria or fungi is very limited. If you dilute it, there can be more (and so use it full strength).

Next time it empties, I'd clean it out, but otherwise use it.