ok i need some help...i have a 75 gal. with chocolat chip (6 mos), royal grahma (2 mos) puffer (1 mos) a few snail things (same time as star fish) and plants. the tank has been set up for 10 mos now. starfish is the only thing that has survived this long. ph 7.8-8.0, nitrate 10 nitrate 0, and...