Recently my fish have been dropping like flies. First it was just the babies to go which I thought was pretty natural as they are very sensitive. But then 2 of my males and 2 of my females died. Now I'm down to my last male. But he's not doing to well. I also have 2 cories and an ADF that are doing perfect. I checked my Ph and it was around 8. Not good. I put some Ph lowerer(not sure of the name) in my tank to lower the Ph and that seemed to work. But it's still up around 7.4. I'm not sure what to do. The culprit is my tap water. The water straight out of the tap is a Ph of 8. If anyone has any suggestions I'd be very grateful. I just want to have a tank full of happy fish.