I have a flat rock the size of my palm full of Gsp can I take this rock and glue it to the back glass of my tank ? Or should I cut it off the rock with a razor place and glue it to the back glass ? If more of the rock is touching the glass than coral will the Gsp still find its way to sticking to the glass ??? Or should I leave it leaves up against the glass like I have it and wait for it to do its thing ? I just added it about three days ago so still closed up