I've been cycling my old tank to give to my neighbor's kids for about 4 weeks now ... have had consistent readings on nitrite and ammonia every day now for about 10 - 12 days ... I add 2.5 ml of ammonia to get to 2 - 3 ppm and every day it is down to 0 ... nitrites about 3 - 4 ppm ... yesterday the nitrites went down to about 1 ppm ... thought it was almost through ... today ... nitrites at 0, but ammonia reading 4 ppm ... which is weird because the 2.5 ml only brings it up to 2 -3 ppm ... the readings seem like the cycle hasn't even started ... what is going on???