My advice to make life MUCH easier is: Get yourself some bristle nosed plecostomas and go bare bottom with no small gravel only some river rock to break up the open spaces and you will never have to scrub out the fish tank again. We raise fancy goldfish....they get quick easy water changes weekly filter clean outs alternating about once a month and we haven't scrubbed a tank yet. Here are a couple pics of our tanks these were taken a few years ago after set up. They haven't been completely torn down ever and the tanks still look as clear as then. We did swap out the acropolis decor for large mopani wood for the bristle noses to munch on.