Think about it yourself:
You want to lower phosphates right? to a supposed "perfect" level of .04 or something.
Problem :
You can't test for phosphates accurately in this hobby yet:
Hannah fannah banana checkers are useless. Don't care what anyone says they are.
Then u buy a reactor + RowaPhos $150 avg price.
After a week you'll find out your killing your corals with GFO, since again You CANT test phosphtes reliably.
You then place your reactor in the closet to collect dust and your back to square 1. How do I lower phosphates?
Those nice tanks you speak of on this forum have all different parameters. Some way off from what most tell you to keep water params.
Good luck figuring out why some are lucky and have nice tanks an others try to imitate them w similar equipment only to find out its a hit and miss matter of luck.
Or they're not revealing something they do which is also possible since only like 2 people here have nice corals. They keep that a closely guarded secret I guess. When I figure it out ill share what the secret to growing corals is.
Coz it ain't GFO that's for sure.