It took about 6-7 weeks for the 29 gallon tank to cycle. At least, it looked like it... When we thought it was ready at the beginning of October, we put in 7 pygmy corys and they seem to be doing just fine so we haven't done much water testing. The testing we did showed very little nitrates and no nitrites (and no ammonia). The plants have been growing and the fish are healthy, active, and eating. Last week we added 8 danios to the tank, and everybody still looks good. But we did a water test on another tank that we've been waiting on (the nitrites have been dropping for two weeks) it showed zero across the board. We kinda wondered if it would be different since there are no live plants in it, so we tested the 29 again to compare and there's... nothing. Zero nitrates, zero nitrites, zero ammonia. It's kind of weird?? And concerning?? There are supposed to be ntirates in a planted tank, right??? Is this gonna kill everything? Or is it normal?