You should test for phosphate. You do want macro algae in
the refugium, as it will grow and outcompete the nuisance
algae growing in the tank.

Marc


Juan Valdez wrote:

I have a refugium with about a 5" bed of live sand, skimmer, and about
55 lbs. of LR in a 30 gal tank. But there's still a lot of green
algae that grows on the LR. Seems the coralline can't quite grab a
foothold and spread throughout the tank.

Nitrates are next to nothing. Do I need to add some macroalgae to my
refugium?

thanks,
Juan


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