Refugium flow


New member
Manhattan Reefs
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Bronx, NY
Do you need a powerhead in the refugium?
Like a nano head.
I have a 30 gallon sump with three chambers.
1 - return pipe and bubble magus skimmer
2 - water drops in from baffle
3 - fuge has about 15 gallons of water (sand, rocks and cheto)
4 - bubble trap
5 - return chamber with mag7 pump

The cheto moves up and down, but i don't see it do 360 turns.
Does it need to? I have a 420nm light on it (24hr). Just blue. Do I need a 10k bulb also?