Hey folks what are your pH levels? I have had scum issues for six weeks now on my 20L, and my net research has pulled all kinds of weird (yet valid) theories. A recent observation that interests me is that scum is more prevalent on acidic tanks.
The only differences from previous tank maintenance were that I had been fighting BBA with Excel, DIY CO2, and also bringing more distilled water into my water changes. Through experiment, I have back-burnered both yeast contamination and Excel overdose as continuing causes, so I was just about to switch brands of DI water...
... but pH kinda fits. The problem developed in conjunction with my pH dropping to 7 and below. How about you all?
I am not ruling anything out or even trying to identify causes... just curious.
(belladee: I've seen a couple mentions of fatty brine shrimp, too)
vegasMatt now lives in sanDiego. In retrospect, it was not a good username.
Last edited by vegasMatt; 07-21-2009 at 09:54 PM.