Advice? Green Hair algae

Cooking rocks is pretty good if you don't know where they came from, but it's a false hope kinda situation imo. Calcium carbonate absorbs phosphates just as well as GFO, but they also release phosphate just as easily. They will reach equilibrium to the water.
It's an on-going cycle, and will always happen.

From trying resin media, gfo, alum. gfo, dsb's, different resin media, massive water changes, zeovit's system, algae scrubber's, lanathum chloride, more massive water changes, Red sea's nopox and reef energy and a doser (actually I got dosers for the RE too) has made keeping a reef tank one of the easiest things ever. I felt soooo bad if I ever lost a single coral, I about gave up fully on the hobby. But then I bit the bullet and tried the 'large corporation garbage'. It ended up working amazingly.

But the key is to use RE at the same time to tip the balance to excess nitrates so you can easily manipulate the level of phosphate too. Unless some random company can top it, I'm a customer for life..

I also thought I was going to use a lot of nopox, but in my 75 when I had it, I went from the doses on the back, to about .5 ml a day. That's about where things settled. I now still have a 1L bottle that's lasted me more than a year. In my 20g I downsized to, I use 1-2 drops a day and about 1-2ml of RE. (as a side note, drew's doser is the most reliable I've found, plus it has 4 rollers)

 

Apologies for the late response~
Piecing info together from I want to say a freshwater phosphate control thing and a couple other similar scenarios, Po4 binds at around 90% efficiency around 8.3-8.4, and then releases to reach equilibrium on a gradient scale away from 8.3-8.4. So to me, it's a complete waste to cook the rocks over months and months.. Just toss em in a bucket with a powerhead, big bag of gfo, DI water, and wait a few weeks. (but then of course cycle them first)
I could be wrong on that, but I seem to recall the conclusion of 'cooking rocks eliminates phosphates for good from the rocks' false hope.. heh..(at least that's how it was being tooted in whatever random post way back when)
I'm surprised that the absorption abilities are not more widespread knowledge, it sure makes a lot more sense as to why people see algae take over at about 6 months, etc.. (because the rocks reach max absorption capacity)