Hey guys quick question, I was given a 20g long Terrarium. I know its a terrarium because unlike a tank the black plastic doesn't sit flat all the way around. For lack of better words its like it has feet. Can I use this for a sump on my 40g breeder build I'm working on. Will these feet things cause stress to the glass on the bottom? If so could i take the black plastic trim off and set it on a foam pad? Just trying to be able to use whats free in this awesomely expensive hobby lol. I know so many questions but thanks in advance!