Yeah I usually just siphon mine out. You have to be careful when siphoning sand... Its really easy to suck up . I usually take the wide mouth off the vac and just straight up stick a hard 1/4" tubing in there so I can scrape off some hair algae and get detritus in LR crevices.
Btw, something I forgot to ask, what are you feeding?
Cool, sounds like you've got a decent variety. As I'm sure you know with so many freshwater, variety is the spice of life. You may want to suppliment with some frozen enriched brine and/or mysis shrimp a couple times a week.