I built it 3 months ago and it looks like this now. What am i doing wrong

by _Turek_

2 Comments

  1. Professional_Dig3958

    Not and expert but it looks like there in nothing to eat the algae. Snails and other critters can feed on algae without them the algae will take over.

  2. darth1211

    Too much light which caused an algae bloom. Looks like the brown at the bottom is dead algae

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