It's a 55 gallon tank. 4 high output 39watt t5's ( 2 actinic, 2 daylight). I try to keep the parameters like so: ph8.2-8.4, calcium is about 440-460, ammonia, nitrate, nitrite all typical at 0ppm. Medium flow. I have two power heads on opposite sides of the tank pointing up, they are on a...