Hello all. I have a small tank 33 gal, with a simple charcoal siphon filter. One 36” 45w florescent light, and one heater. The system has been going now for 4 month. There is about 22 lbs of live rock, 1”1/2 of live sand. Since I started the tank I have put in 5 Astrea snails, 7 blue leg...