My African tank is starting to get some algae that I can't keep up with. I don't want to put a pleco in this tank. The snail doesn't have to be African. Just something that can survive with them. I have some concerns though. I put a 3D background in about a month ago and I'm worried a snail may damage the background while eating algae off it. Like when plecos scratch Acrylic tanks. Any thoughts on this? And suggestions for snails?