Thanks alot for the tips! I don't plan on making the background the regular way, wanted to make it piece by piece. so i can carve out the rocks one at a time and know how they'll look instead of working inside the tank.
does drylok give the rock-look like the grout does? I love the look of the grout based on pictures, havent seen any coated with drylok yet.
I was just wondering if they will make a huge noise, like, louder than my alarm clock haha but from the sounds of it, they should be fine