RTN or hopefully something else HELP

[bling_bling466]

Well the frags are all alive still with good PE. Im not to sure on the LED brand as i got them from a friend. but like i said ive got a clam at the bottom of the tank thats been there for 6-8months. and my other acros are growing. (maybe not a inch a month but there is growth.) i dip all my corals for about 30 min then do a coral rx dip. i hope ive got this issue undercontrol lol. i got some other corals from the supplier and there doing great lots of PE. i guess time will tell