hello, trying to get my 120 in shape, has very high phosphates, nitrates. I read the long 7 page thread from a few years ago, and looking for thoughts on how that worked. does it work well for removing po4 from the tank and rock, countered after with a bit of gfo ?? i can do water changes to get things down, say 25 to 40g ?? but how often, every day, every few days, week ?? Home made nopox is another option, i still have some TMZ mix nopox formula, i could use. i also have a few reactors, and could use the HC gfo, but thinking i'll smoke it very quickly with high and most likely rock leaching. thoughts, opinions ?? tank has a few lps, lots and lots of RBTA, 4 fish.