TooManySnakes Posted December 5, 2020 Share Posted December 5, 2020 I added a UV sterilizer I had laying around to a 29 gallon that is empty at the moment. I had a bad outbreak of columnaris in the tank and I’m leaving it for fallow for 6-8 weeks to try to reduce pathogen levels in the tank. Last night when I added the UV sterilizer the tank was clear with no tint to the water whatsoever. This morning the tankwater has a dark tint to looks almost purple compared to the typical brown tannin stain. Has anyone seen this before? Any ideas on a possible cause? This is the normal state of the tank water for reference Link to comment Share on other sites More sharing options...
Brandy Posted December 7, 2020 Share Posted December 7, 2020 hmm. I wonder... if you put it in a white container what color is it? I think mine has done this, when the free floating algae is dying. A water change usually solved the issue. I always assumed it was dead algae particles just refracting the light and background color. In a cup the water looked clear. 2 Link to comment Share on other sites More sharing options...
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