I have a question for you all. Is it possible for me to get sand as a substrate for my tank even though my filter comes up through the bottom? Here are a couple pics of it. It sucks in through the top of that white pipe, and comes back out into the tank under the gravel at the base of the pipe. Since the outake is at the base, and the intake is probably 8-10" up from the bottom, can i use sand as a substrate? I'm tired of the gravel I have now lol



