Posted By Ashlar on 09/05/2007 3:44 PM
Organiphosphates are the one that can't be tested without a $400 test kit (or access to a lab.) It's so expensive becasue there are 10-15 different reagents because of all the different forms it can take.

Every tank has phosphates- it's one of the basic building blocks of life- Carbon, Nitrogen (nitrate), and Phosphorous (phosphate). You run into trouble when you have phosphates that aren't being taken up out of the water as fast as they are introduced. (testing positive for phosphates)

Even if you test zero for phosphates, if you have cyano, bryopsis, or other nuisance species, a phosphate absorbing media can help starve these nuisance species.

I recently purchased a Hana Colormeter and would like to believe it's fairly accurate..... I've also started running Warner Marine PhoSar HC(High Capicity) I really like it! My numbers dropped from .008 to .002 from when I was running the TLF media. After a month my levels only raised to .004