My parameters these days:
Alk: 8.0
NO3: 25
PO4: .45
Temp: 76-78
PH: 8.0-8.2
I don't test for much else and do 20% water changes every 2-3 weeks. The only thing I struggle with is phosphate - but I also struggle with whether or not to care. It got as high as .7 before I started to make efforts to get it down (feed a little less, did a couple more frequent WCs). It's slowly creeping up again.
I know this is one of those highly polarized topics - I read a study that gets thrown around a lot that showed coral grew the fastest at around .5, albeit with weaker skeletons. A lot of other folks in the hobby (Rich, Sanjay, Kenny, etc) run really high po4 with no issues. Many coral farmers and other successful folks insist on much lower levels.
Alk: 8.0
NO3: 25
PO4: .45
Temp: 76-78
PH: 8.0-8.2
I don't test for much else and do 20% water changes every 2-3 weeks. The only thing I struggle with is phosphate - but I also struggle with whether or not to care. It got as high as .7 before I started to make efforts to get it down (feed a little less, did a couple more frequent WCs). It's slowly creeping up again.
I know this is one of those highly polarized topics - I read a study that gets thrown around a lot that showed coral grew the fastest at around .5, albeit with weaker skeletons. A lot of other folks in the hobby (Rich, Sanjay, Kenny, etc) run really high po4 with no issues. Many coral farmers and other successful folks insist on much lower levels.