Hey gang- After having my long surviving 30 gal fall apart, I left it running fishless for a few months and recently decided to restart it. I replaced both filters ( Marineland 300 w/biowheels ) and the old substrate, replaced the evaporated water and let it run for another 2 weeks. Without doing my research and jumping the gun, I added 3 orange platties and 3 silver tetras (all chem levels were fine before adding). After discovering this forum, I now see how big of a mistake it and that I should have cycled the tank before hand. I'd like to do my best to make the cycle process as smooth as possible for the current crew in there. I've been checking the levels every day, and started doing 4 gallon water changes (daily) today. Any suggestions that you guys could make would be appreciated! Here's the rundown of my daily water tests since adding the fish: Date pH Ammonia Nitrite Nitrate 9/4 7.6 0 ppm 0 ppm 0 ppm 9/5 7.6 0.50 ppm 0 ppm 0 ppm 9/6 7.6 1.0 ppm 0 ppm 0 ppm 9/7 7.6 1.0 ppm 0.25 ppm 10 ppm I've all ready begun to slowly bring the pH down a bit.