So I've read about cleaning the main tank, doing weekly water changes, and topping up the water to keep the salinity reading as close to 1.026 as possible at all times, which I do daily, weekly or when it's time.

But what about the sump maintenance? My sump has been running for 3 months and I'm seeing some sediment in all chambers. Should I vacuum the stuff out, do I need to do a thorough cleaning? I do not have any live rock or rubble in the sump, clear glass bottom. Just curious what other do to their saltwater sumps.