in tank

Hello all. Quick preference poll. I have an aquatop recife 40 AIO and have a large 3x3x7ish sponge in the first chamber. I haven't had any issues with it but know it will need to be replaced eventually. I'm looking at the in-tank floss holder and floss pads but could also just buy a new long...

New to this forum and after searching everywhere can't seem to find a good answer. My question is, How do you frag coral that is one a really big rock or on a piece of Rock that provides structural support to the rest of your rocks? Im assuming i can frag in the tank if i cant remove the rock...