Well, I guess I will have to get nitrates at 20 or less with a water change. Should I do like a 50% or something or like a 20% every few days until it clears up? I tried feeding less, but wonder what it's still medium/high. I currently have the one gourami "quarantined" in an old wonton soup container hanging on the side of the tank with a bent coat hanger, but I don't want him in their longer than he has to be. Should I return him to the rest of the tankmates shortly?