My little guy is doing a lot better. His tail is back to normal color, he is less chubby (guess he had a bit of bloat), and the red part at the base of his tail is slowly turning back to orange. He is still resting a bit but is a lot more active than day 1. I got the bottle of prime and did the water change. Yesterday was his last day of the sulfa meds and tonight I'm supposed to do a 25% water change and put a new charcoal pad thing back in the filter (no charcoal was in during the 3 days of medicine). I was testing the water with strips which I researched and found to be no good, so last night I bought an API master test kit. I am going to test the water tomorrow (give the 25% water change and filter a little time). I've been poking around on Kokos, reading, I'll have to make a post. Today I used my last test strip and still have a zero nitrate reading. I will cont to do water changes every other day with the seachem prime and then test until I do have a nitrate reading. Or should I do a 25% change with prime daily? I can do either, I am pretty attached to these ranchus. I am getting the UV Sterilizer next month, Cynthia said this would be a good thing to have.