IMO, there isn't a real bullet proof phosphate test kit out there....but that's me. For that reason, I've really stayed away from those test kits. You could give it a shot though but I cant offer any input on it.Btw. I really like the new test kit. Very easy to read. Although the api kit I have is pretty much spot on, I like the and ease of use of the nyos kit better. Any experience with there phosphate test kit? I’m not crazy about my Seachem phosphate kit.