Well, my question isn't so much about tanks, but a pool I have in my basement for fish. Any inexpensive ideas how to siphon out the stuff at the bottom of this pool? Its not high enough for the usual hose and bucket method. Its starting to get pretty nasty, and all I've been doing is taking buckets of water out to do the water changes. This works to a degree, but not for the muck developing at the bottom. Thanks.