What type of macro for refugium?

[RoyalGramma001]

Hi everyone, I have a 20 gallon tank that has a bit of a nitrate problem that I'm working on and I got some lps corals. What is the best macroalgae for a hang on back refugium? Also I was thinking of getting the finnex hang on back refugium is it any good?

[Tired]

Chaeto is the standard, since it's a good place for pods to live and generally easy to grow. Make sure you have a good enough light to keep it alive and growing. 

[RoyalGramma001]

Yeah the finnex comes with a light

[Tired]

Can't speak to how good it is. Look at online reviews for it, see if anyone on this forum has one and has talked about how it works. If it's a device that circulates the tank water through it, has a bright enough light to grow chaeto, and won't fall off, leak, or otherwise physically fail, it should be fine. 

[RoyalGramma001]

3 minutes ago, Tired said:

Can't speak to how good it is. Look at online reviews for it, see if anyone on this forum has one and has talked about how it works. If it's a device that circulates the tank water through it, has a bright enough light to grow chaeto, and won't fall off, leak, or otherwise physically fail, it should be fine. 

I think it's just a refugium filter to filter the water. It has 5 stars so I assume it's good. Yes it does circulate water through it

[Tired]

What do you mean by refugium filter? 

 

A refugium is a chamber that's separate from the rest of the aquarium, to allow algae and microfauna to grow safely, while circulating the aquarium water through it. A refuge for the algae and microfauna, essentially. They don't usually have any filtering ability, aside from something occasionally snagging in the algae.