Is anyone supplementing iron or any other ferts for their refugium macroalgae?
 

I'm thinking of supplementing iron to help my chaeto grow, not sure which type of iron to get, wondering what anyone else is doing. Also is anyone supplementing anything else for their macroalgae?

I just started to add plant fuel made by Florida Aqua Farms. They make a plant only and one that you add if you have fish.
My Cheeto does nothing in my refugium it's only grown about an inch bigger in the last six months.
I have noticed improvement on my macro algae with this stuff though but it has only been about a week since I started adding it.
The stuff that you add if you have fish has no NO3 or PO4 only trace elements.

Marlin65:

Is your plant fuel from Florida Aqua Farms MICRO ALGAE GROW? If yes, where did you get it?

No that is F2 I have that as well Plant fuel is for Macro's you can get it for if you have no fish or have fish. Comes from FAF its their brand.