Hair Algae
 

Dear Friends

My tank has been the victim of Hair Algae. Whatever I do, it comes back.
I removed all corals and added 30% methylene blue and hold for 24 hours.
All the hair algae dead. I carefully brushed the dead algae and changed water 90%. By-the-way, I removed carbon from the reactor before treatment. Now the tank looks good for 1-month. Again, the hair algae coming back slowly.

You need to check your parameters.