Tannin staining tank glass

Discussion in 'Driftwood' started by ristin, Apr 1, 2010.

  1. ristinNew MemberMember

    I boiled my driftwood numerous times until I wasn't getting much brown water. I added the driftwood to my tank and after a week or so the water starts turning brown. I'm running a Fluval 405 with carbon & a Tetra 30-60 with carbon. 50% water changes clear it up, but the upper corners of the tank stay dark like the glass is stained. Is the tannin staining the glass? If so, can I clean it without having to remove the fish?
     
  2. NutterFishlore VIPMember

    The tannins won't be staining the glass. Probably just looks that way because of the angle of the lighting. If it's not the lighting then it may be diatoms forming on the glass though I would normally expect them to form elsewhere first.
     
  3. ristinNew MemberMember

    You were right, the dark stained looking areas were just shawdows. I moved the light forward and the "stain" went away.
     
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