HI there! I have a 75 gal. freshwater tank in which two clown loaches contracted Ich. It was a stubborn case, 1 died in the 75 tank and the other I moved to a quarantine tank and lost it too. I treated with Rid-Ich. I have put the charcoal back in 75 gal. tank. The tank and fish look beautiful right now. Everyone is healthy and eating well. I have silver dollars (5) , platys 3 adults , platy frye (didn't plan on these little guys (12 that I can count!) , suckers-little ones max 2" (4), and neons (11). I am thinking I should add aquarium salt to treat the possibilty of lingering Ich.....at the rate of 1 rounded Tablespoon per 5 gal. slowly adding. Am I on tract here or leave the happy tank alone? Need some expert advice. No nitrates in water, no ammonia, ph is steady 7.4, and temp is 82.5.