Whats your P04? (Per hanna meter) For optimum SPS #'s

[Big E]

My P04 is .18 right now & my corals are very colorful. Even nicer than when it was at .02-.03. What's interesting is that my glass is clear & I haven't cleaned it in five days. I cleaned it all the time at .03.

I think theres a relationship between N & P that creates a balance.......if your ratio is correct than you'll see the results. I'm not sure this is something that can be measured, although I'd like to check my nitrates with a photmeter to see what they are......with a Salifert kit it's 0.

I use a skimmer & water changes........nothing else. I've been contemplating using some GFO.