wilson3821
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- Joined
- Dec 23, 2002
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I am trying to find out what is causing this brown algea looking stuff forming on the inside of the tubes connected to my underground filter... I have cleaned it off once and now it appears to be coming back... I have a 55 gallon with no problems the only difference is the lighting... In the 75 gallon I have put a color light with the normal type of light. Any ideas? Thanks!