I have several scallops in my tank, they've been attached to some of my "main" rocks for quite a while now and are slowly pushing them out of place. I was wondering how you remove them. No, the rocks can't be removed from the system, way too big. They seem to realllly be stuck on there. I feel that if I use any more force (or a butter knife for leverage), I'm going to hurt/damage them. Am I being too careful or is there a trick I'm missing?