Sand works great...fish love it. Try not to go deeper than 1.5'' with it but I have a few spots in my tank that are closer to 4'' deep. Just got to make sure you aggitate or stir it around once or twice a month like stated before. I've also been told to cover my intake with sponge or foam to prevent the sand from going in...also like stated before, I never did that. Made sure that the intake was closer to the mid-way point of the tank and not at the bottum near the sand, shut off the filter when cleaning...that's important. I've never had my filters seize up.
Also important, when you're cleaning the glass, make sure you don't get any sand granuals in the scraper or sponge when near the bottum or it will scratch the hell out of you're glass.
Also important, when you're cleaning the glass, make sure you don't get any sand granuals in the scraper or sponge when near the bottum or it will scratch the hell out of you're glass.