I'm looking into installing a more automated top off system for my tank. Right now I have a 'manual' system in that I have a 15g reservior set up next to the sump (mounted a little higher than the sump) and am doing a gravity drip of RO water. It's a bit of a hassle to manage, but works far better than doing small additions of water 2x daily. Anyone have any success with doing this on a relatively low budget. I've seen the high tech stuff would prefer to go low tech if a viable alternative exists.