How clean do you keep your sump?

[asylumdown]

The largest chamber of my sump is drained for water changes, so I siphon out any gunk that's in there. I pump fresh RO water directly in to that chamber and mix the salt in it so it pretty much toasts any critter that was unfortunate enough to have moved in during the time between water changes.

The other 4 chambers have never been cleaned and probably won't be because they're covered with sponges, fan worms, small mysis shrimps, pods, etc. The chamber my skimmer is in has collected a dusting of detritus at the bottom (that has precipitously shrank since i started dosing MB7) that is literally alive with bristle worms and limpets.