In one of my tanks I tied the driftwood to the UGF and then put my gravel down and it stayed in place 
If you use the slate screw it down with Stainless Steel screws. If it isn't enuf weight then you can add larger rocks to the slate base to keep it down. I used fishing line on my moss, I just wrapped it with the fishing line and tied one knott. If you use the staples then make sure they are stainless steel.
If you use the slate screw it down with Stainless Steel screws. If it isn't enuf weight then you can add larger rocks to the slate base to keep it down. I used fishing line on my moss, I just wrapped it with the fishing line and tied one knott. If you use the staples then make sure they are stainless steel.
