great white with wilma system

hi all, ive just got a wilma 8 pot system to start growing some great white,i normally use soil but thought id try hydro, has any one got any hints or tips it would be much apreciated,ive been told to feed them 2 or 3 times a day but how long do i set the timer for? 3 x 15min? i was going to grow in coco
 
Top