So I don't really ever run any mechanical filtration on my tank. The first and second chambers of my sump collect a lot of detritus, which I suck out occasionally with a hose. For my sand, I've been physically stirring it up to free detritus so it flows down my overflow. I'd like to occasionally vacuum it, but with my auto water changes going I don't want to do a large water change like I used to do when cleaning my sand. I've thought about building something like this out of a 5 gallon pail. Does anyone see any potential issues doing something like this? Its basically a gravity fed vacuum that drains into my sump, so I won't need to dump water and replace it with new water as is the case with a normal water change. The only thing I can really think of is if the filter socks clog, I could overflow the bucket, but I could probably just drill an overflow line and bypass the socks at the top of the pail. Probably a smart idea. The siphon line was going to be 1/2" (basically just modifying my existing water vac with a longer hose). Thoughts?