So, the 75 gallon is cycled, and has been for 2 weeks. I had been waiting for the Quarantine Tank (30 Gallons) to cycle, but I started it late. Once the 75 gallon showed cycled, I seeded the QT with decorations, substrate, and filter media from the 75 gallon, and it shortened the cycling to 3 weeks. Longs story short, the QT was ready last Thursday, and on Friday 3/24, I brought home 15 brilliant rasbora from the lfs. LFS says he has had these fish for months, but I am placing them in quarantine anyway. This is my first experience buying from this store. After having them in the QT for a couple of hours, I noticed 1 had developed a curve and little bit of a curve to his spine, and didn't quite seem to be keeping up with the school. I named him George, and decided to keep my eye on him. He was eating and his color looked good. On Saturday morning, I discovered that my PH had dropped from 7.4 to 6.8 over night. George was still showing a curve, but seemed to be doing better keeping up with the school, although it was still easy to pick him out. I noticed another fish had developed a white nodule on one of his pectoral fins. Not sure what it is, maybe ich? or some other parasite. Off to Petco I went. I got some crushed coral and added a bag to the filter. I also picked up some Imagitarium Parasite Remedy and added a dose to the tank (3 tsp). This morning, George appears to be completely recovered (I cannot pick him out of the school), and the nodule is no longer visible on the other fish. PH is back up to 7.4. Interesting thing is I have some of that driftwood in the main tank and it has not effected the PH, I will have to monitor that closely. That is the main reason I put a piece in the QT, so water parameters would stay similar! Oh well.