Yeah that is the weirdest thing, the water does not stain with tannins, but there is no carbon. When I presoaked the wood for a couple days it made that standing water super brown, maybe it leeched enough that it doesn't stain anymore, but that just seems odd to me nevertheless.
I have probably about 3 gallons of plastic bioballs in the sump and over top of that is some filter floss. Other than than the Tunze that is really it to this tank. I do use a cable heater in the substrate but I don't imagine that has anything to do with the lack of tannins in the water.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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