Ok went out and bought a liquid Nitrate test kit. As of this morning my reading's are. Ammonia-0 Nitrite-0 Nitrate-less than 5 PH-7.8 Temp 76 I added 2 more Tiger's to my community to keep the Zebra's in check. Now I'm finished for a bit. I now have 6 Zebra's, 5 Tiger's and 3 Cherries. All the fish seem healthy and very active. Will sit back and enjoy the show now. I'll keep up my water testing and change's on a regular basis.