If you are willing to pay shipping on a 14Lb bolder you can buy them
I will probably move it to the FOWLR tank.
Beleave me it I could pry them off the rock I would.
Don't kill me but for now I have resorted to killing them with the siphon hose. They are burning some of my SPS's
Anyway I'm off to do the water change...
No one has info on Diatoming a SW tank?