I am going to be setting up my 200 gal shortly and am wondering what you all think about how many gals of bio balls I will need. Occupants of this tank will include 5 pbass, 3 lenticulata pike, maybe 3 sp. Xingu II pike, and maybe a silver aro (also considering putting my cats in there). I was thinking of doing a sump with 10 gals of bio balls. Do you think i should do more or less? I am going to run a mag 12 on the sump