I have been fighting ammonia in my tank. Ph 7.2, ammonia 1ppm, and nitrite 0ppm. I had 6 tiger barbs 2 bala, 1rts, a blood red parrot, gold severum, and 2 blue acara in a 60 gallon tank. In the last 2 days I had 1 tiger barb and 1 bala die. I noticed white spots on my other bala today and he is...