Im slowly winning Dave! Using lots and lots of prime! Not even a week since I got a refill and its gone (medium bottle, 750ml maybe?). Anyways, last thursday is when I got the refill and its funny because I bought another bottle of prime as 'backup' and Im so glad I did. I'll be using it tonight and going to get another refill tomorrow. Like I mentioned before, Im dosing about 3x the regular dosage and if I see the discus breathing quite hard, I usually use 2x the dosage again. Still using salt and temp at 90F with 80-90% water changes daily. At feeding time, some are a little timid but for the most part, they 'attack' the food. Now its patience to 'win' them over again after the 'frightening' experiences by an unexperience dolt.