I wrote last week asking for any ideas as to why my fish were dying despite decent test results, etc. You were all very nice in offering suggestions and I appreciate your help. Yesterday my son brought over a voltage meter and his "could it be..." turned out to be the answer. The powerhead I was running, despite being brand new and well rated, was leaking 3.5 volts of electricity. Hopefully the replacement of the powerhead, along with incorporating some of the suggestions offered, will send me on a much happier experience with salt water.
Karen
Karen