Bought 3 green chromis. Currently in quarantine for 3 days. They ate the first day, but now aren't eating. See no signs of sickness. Checked water params and I had ammonia at 1.0, 0 nitrite, 8.2 pH, and 40 ppm nitrate. I did a 20% water change and am still looking at ..50 on ammonia. I want to...