Not sure what type but the original one split, so the one is OK and has stayed put, but the other one started to move around. I had a power head hidden in the rock, thats where he got caught. I,ve moved the pump now. I am going to move the reef tank (4ft) into my 6ft fish only tank, that will give them both abit more space. (when I;ve got two feet again!!!) I will keep an eye on it now, hope it survives. The fire clown has now chased my two clowns out of their anenomie, because he has lost his one!! The anenomie is brownie purple with green tips.