I have a couple frags and a small colony of diffrent types. Some are opening good others not to good. On the small colony 80% are opened fully the rest don't open at all. My question is what type of placement is best for these guys. I have a 9o gl With T5 lighting and K4 K3 powerheads. 4 bulbs. Where should they placed as far water movement. Any advice. Thx