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Slime on surface of anodizing tank

I am having problems with dark, slimy (maybe oily?) feeling substance on the top of my anodizing tank. I think it may be a type of fungus and believe it may be the cause of some very small pinhole sized voids in a black coating. Isn't there some type of biocide for acid? I hate to put anything in my tanks without knowing for sure. If anyone has any info on this, I would really appreciate you help.

Teri Andrews
anodizing plant owner - Albany, Oregon
October 15, 2009

Are you using the glycolic acid and glycerin anodizing additive which feed algae?

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

October 16, 2009

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