I used smartponds black animal safe pond foam for the background, carved it and siliconed spots and applied cocofiber. I liked the color of the foam and how it looked as rocks and I wanted to leave a lot of that exposed (i am satisfied with this part visually. however, am I going to have any issues with the foam not having dryloc? I kind of jumped the gun. Do I need to go back and do anything, or is this fine for now?