Hi, I'm trying to make a blind cave tetra exhibit that looks realistic, but I'm fresh out of ideas, lol. Does anyone have any? I was thinking about having stalactites and stalagmites in a natural color tone(reddish-brownish in color), but I have no idea how to go about making it. Any thoughts? The tank plans to be a 10-15 gallon with blue lighting for the cave effect. Thanks!