What is the best way to get zoo's to grow rapidly?  I have 350watts of PC on a 75 gal tank.  1 4 ft 4x55 watt. (2 10k, 2 Atc) and 1 30" (2 50/50).  Outside of going to MH is there a good combination of supplements to aid growth?  I just got some iodine, buffer, builder and advantage calcium from seachem.  Is there anything elese you reccomend?