Ive been running a tank for several months now with no filter so far. It has a tiny powerhead and I do waterchanges twice a week (25%). The tank was clear at first, then the brown algea came in, went away and now the water seems clear (except for the debris fish kick up). I have some plants in there with bamboo and added more driftwood. Anyone have a tank with minimal filters?
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true true u want to be safe 

