You accidentally left caps lock on.
How old is your tank? If this is a new tank, a bloom of algae is expected, and most likely will pass. You don't even need to read the rest of my post if your tank is new and this is it's first algae bloom.
Most test kits are not precise enough to detect the nutrients fueling the algae. After all, all those nutrients are being converted into new algae as fast as the algae can.
You have a few options:
1) Starve the algae of light. Turn your lighting down to only a few hours a day. Your corals may not be happy with this, but they should be hearty enough to weather it for a little while.
2) Starve the algae of nutrients. Plant some macroalgae that looks attractive in your main tank, or something known to be a fast grower in your refugium. The macroalgae will compete with the hair algae for the nutrients in the system, most likely the macroalgae will win the fight.
3) Get something that eats it. I'm not going to be too specific here, as I'm not very knowlegable about marine animals yet, but if you do some seaches on the forum, you'll find specific crabs, snails and fish that will help eat the algae.
