I am having some problems with my angels. I cant seem to keep them alive. I was worried about the pH but it is at 7.4. I tested the amonia and it is at zero. i have bought a dozen angels over the last 3 months and they live for 4 or 5 days and then they just die. I have other fish in the tank that do just fine. I feed regularly so i think they are getting enough food so if there are any ideas floating around please let me know.