I'm starting a new 155 I have about 80 pounds of lr and 60 of ls I have ordered rock from Marco rock 50 pounds I'm wondering if adding the rock will cause a cycle or if I can add a small piece like every week and a kid the problem I would just add it and let it cycle but I stumbled on a piece with 3 nice brain corals and I don't want to kill them if it cycles everything I've added has been from an established tank so I havnt seen any spikes will my tank cycle and will the uncured rock cause it to if I add it slowly?