What is the best way to clean a sump without breaking down a system? Have you used methods that work well, or methods that I should avoid? My sump is a 10 gallon glass tank, divided into a refugium section by a plexiglass sheet with holes. Inside the refugium, I have live rock and a xanthid crab and chaeto. The junk builds up in the bare bottom refugium. I cannot siphon the junk, because the sump is close to the floor. Suggestions appreciated!