Thanks for the info, Byron.
I have a couple of live plants in the tank, though not many for the tank size. I will eventually be getting more. I also have 2 pieces of driftwood, which my plecos absolutely love.
My test results must be off because I've had no casualties yet and the fish seem to be active. I hope I'm using the tests correctly...I'd feel really stupid otherwise. I just went to the store and got my bottle of Prime, can't wait to get some in the water! The water temperature stays around 86F, is that too high? As for the PH of the tap water, I'll have to test that out. I will post the results once I get them. Again, thanks for the help, I really appreciate it!