New to refugiums

[dacookster]

So I added a 5G refugium/overflow to my system. I added about 6lbs of cured LR. Since then of course diatoms and what looks to be dino's on my sand bed. My question is - do i try to syphon out the waste developing at the bottom of the rock in the refugium, just like you would a regular tank? It's pretty cramped but if I have to do it to preserve water quality - I will. Also, I think some of the LR is loaded with aptasia. Is this fine to grow/linger in the refugium, or should I attempt to eliminate it as well? Thanks all!