thanks the only reason i dont mind moving them is my friend just gave me them yesterday and he had them under high powered t5,s and i have placed corals mid water and all looking good i was given a massive metalic orange staghorn acro and a green slimer and a birds nest coral and a plate coral so i have gave them loads of water movement and some of my old corals on bottom of tank that were looking a bid poor have all seemed to have had a new lease of life and all new corals have polyop extension but will keep eye for any changes !!!!!