Hi all i have same kind of set up got 4x 600 in a 12x5 room 10 ich fan and filter 2 6" cold air feeds 3 recirculating fans and 18 plants in 50% pebbles 50% rock wool im just into my 2nd day vegging and plants looking real good they are on 4 big trays and all have plnty of room is this good or...