Salifert Phosphate Kit

[dirtyreefer]

The salifert PO4 test kit I find really sucks. The readings between levels on the bar chart is so ambiguous, and very difficult to tell from looking through your test vial. If I had any color, I would not be able to distinguish between the first bar and the second bar which is useless to me.

There is the Merck test kit that JL's sells for around $130 (don't quote me on the price however it's not on their website yet) which is supposed to be highly accurate and lab grade standard. Big bucks though.