12-07-2008, 09:32 AM
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Ok, first of all I need to know the water parameters, as in ammonia, nitrites, and nitrates. What do you mean the filter is fairly new? Did you transfer some old bacteria from a previous filter? I can't be sure yet but it sounds like your having a mini cycle, do an immediate large water change (50%). Then do smaller 25% ones everyday until it is possible to get a water testing kit. I recommend API liquid master test kit, thats tests for ammonia, nitrites, nitrates, and pH.