I am puzzled about green hair algae.

I also cut feeding back a lot over the last 2 months.

 

It's obviously not so tiny.
Most people don't realize how much waste a Fish actually produces.Some fish like triggers make an enormous amount. Letting it grow out will not help.As it starts to die it feeds more growth.

 

Look to your algae eaters and clean up crew, every time algae types start taking hold I add new charcoal/brand name, phosban passively run and I buy the invert or fish that eats algae.

Chitons, Abalone, Urchin, Trochus, Astraea, Certh. Every time I add a good algae eater it's has resolved the issue if: it was not Byropsis or Dino, or Cyano. My Rabbit/Fox Face is a champ, but I DO NOT RECOMMEND BUYING A FISH FOR A PROBLEMS RELATED TO HUSBANDRY, or starfish, or sea slug.

Algae issue do not resolve over night either, it takes weeks. I am just now seeing the tail end of new tank bloom.

If you're using RO/DI that test well, and not over feeding, then I would look at adding a more diverse clean up crew and trying some phosguard, phosban, GFO as directed and to a lesser dose, start small and move up, go by a much lesser recommended dose.

 

I forgot to mention that is one other thing I did too, I added a clean up crew from reefs2go about a month ago.
I basically did everything possible, and it is now back

 

What kind of cuc is the question though? Are you absolutely sure it's GHA?

 

I forget which package I ordered but it came with a mix of all.
I am not 110% sure its GHA I'll try to get a picture of it

 

This is about 2 weeks of T5s on, before that the LR were clear of it

 

https://www.reefcleaners.org/nuisance-algae-id-guide

 

I am battling wicked hair algae after my upgrade. My plan is to size my skimmer body to my pump. My skimmer pump was too small for the body, so I just purchased a new body (the one sold with the pump) to elp improve skimming that was pretty minimal. Additionally, I plan to add a 36 square inch algae (4" x 9" with a 200 gph pump) scrubber designed using this link here:

https://docs.zoho.com/sheet/published.do?rid=b0tmj6d91ce368ee542aba6b2b670ae00412b

Lastly, I plan to add either an urchin or few Mexican turbo snails, lettuce nudibranch (last resort, as they die without algae) or a sea hare, or a combination of the 4, to clean up the hair algae that is left after my nutrient drop.

I also plan to do weekly 4-8% water changes

 

Would you agree from my pic that it is GHA?