thanks tons
not everyone agrees with it

especially people with multi hundred gallon tanks who don't have to scrape out algae/do surgery on the rocks like normal folks will require.
they thing we're crazy taking apart tanks, rinsing sandbeds, taking rocks outside the water to purposefully kill off algae. I was driven there; I didn't ask to be that busy of a reefer.
The only thing it took to be driven there was losing my previous reef to invasive red algae after 4 yrs very hard work and cost, and following the masses on their algae paradigm.
I became angry and swore Id Jason/Freddy/Jack the ripper it out if I ever saw its scallywagging tail around my parts again.
only loss will drive one to quit farming algae, trying to save you that loss in 2020.
getting lucky will have us telling everyone to farm it, we think that what works in our tank can be upscaled to regular unlucky folks. Surgical action does not fail though it takes work and its unnatural, that wont work for some.
I found a mid ground now in pico reefing... we guide and farm early on until coralline and coral flesh takes up all surfaces, then we can quit farming. I haven't treated my tank for invasive algae on the rocks or sand in seven years cuz on round two I didn't allow algae, I never will again.
we don't mess with nutrient controls. we set them to what corals want, we murder algae simply put wo asking permission. the smaller the tank you have, the easier that method is and the larger the tank, the more we need water controls to hopefully starve it.
Grazing is what nature uses. algae cannot grow where a hawksbill or parrotfish bit it off the reef then pooped the sand clean. When we use knives and peroxide and harsh rasping/sandbed rinsing to force algae out, we're really just mimicking the mean nature of the reef anyway, through unnatural accomodations.
My tank cannot be invaded by algae its not possible, I sleep better that way though Im willing to bio cheat to force it that way.
skim these links. look at the hesitation constant. I know you are already scraping and doing good work which is perfect...just wanted you to see the method doesn't end even when your tank ages.
we are importing much rougher tougher invaders with the frags and things we buy than you are facing now, act early as a for sure way of control and these show some might fine cheat options too. Im not saying every likes or should use peroxide to cheat a tank clean, these links simply show how people presented
who were already managing nutrients quite well and still needed to simply stop farming.
http://www.reefcentral.com/forums/showthread.php?t=2082359
https://www.nano-reef.com/forums/topic/268706-peroxide-saves-my-tank-with-pics-to-prove-it/?page=65
anyone who likes algae scrubbers disagrees with literally everything I typed ~