Ok here is my situation I been cycling my aquarium for over 6 weeks now, and I finally thought it was cycled because I got my readings at from 0.25 ammonia, 0.25 Nitrite, and 0 Nitrate about my 6th week in the cycle I finally got 0 Ammonia, 0 Nitrite, and 10 Nitrate so I thought I was cycled, so I waited a couple of days to get my starting fish then on my 3rd day of getting the fish my Nitrite started appearing again at 0.25 no ammonia and 10 Nitrate, so I did a 50% water change and got better to 0 then the same day wich is today started going up everything ammonia at 0.25ppm, Nitrite at 2.0, Nitrate 20 or 40ppm what's going on am I cycled or not I'm I I had hair I would be pulling them out because is so discouraged and feel like quiting please some one help this poor guys I can't even sleep I'm putt fritz comple to keep them somewhat safe but not sure what else to do oh the only thing I can find a suspect is this stupid sponge Bob pineaple Ornament and is out just incase it was that sorry for this been so long story please halp.