09-29-2010, 01:16 PM
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Quickest cycle ever!
Last month I got my wife african butterfly fish for her birthday (some may have noted my posting about this previously). I took one of my old filter sponges from my well established oscar tank, cut it into small pieces and put it in a submersible filter for biological filtration of a 20 gallon short tank filled with about 15 gallons of water (which is what the filter is rated for + it affords a low surface for the butterfly fish).
We started with only one butterfly fish for about a week then got another then a few more. I kept a close eye on the water parameters assuming I'd have ammonia spikes but I had none whatsoever. The tank appears as if it's been well established even though it's a new tank. The nitrites were slightly elevated for a few days but since then the ammonia = 0, nitrites = 0 and nitrates hover between 10-20.
It's just the swiftest cycle I've experienced. Those established sponges worked great!