I was just wondering what type of sand to use and what size grain. I've had a tanganyikan cichlid tank before with fine sand and let me tell ya, it's a pain in the butt when u have to do a water change cuz the siphon will lift up the sand as well making it hard to do water change without clogging your sink with sand. So, I see this brand called Aragonite sand that is bigger than sand u find at a beach or playsand. Is this OK? It's smaller grain than crush corals but bigger than fine sand.