Tap water purifier and algae growth.
I am going to slow down the filtering and try that. The cannister has only been used for about 20 G so far and I see no discoloration in the cannister yet. i am thinking of adding a few more snail as I only have 6 Turbo snails in a 33G, I also have about 6 - 7 hermit crabs.
Patrick
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