Do you have any sort of mechanical filter on this tank? That's what I thought you were talking about, but Myka's right, if all you've got is a glass box with fish in it, it will never cycle, and even with regular dosing of ammonia binders, and frequent water changes the water quality would fall rapidly and would impair your fish's health long term. If your'e only using a couple small pieces of rock and powerheads for water movement, I would be worried that over time your water quality is still going to suffer.
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