whats a good phosphate test kit

[mxpro32]

I have the api test kit and it always reads 0. also it isn't very sensitive. The first detectable change in color goes from 0.0 to 0.25. I want on that will read in the 0.0x range. Any body know a good one?

[Jabrams]

perhaps La Motte or Elos

[JMAdams]

I use ELOS.

[nanoreef-R]

Elos

Deltec

Hanna Meter

[lakshwadeep]

+1 to hanna.