PO4 test kit

B

BPKlein

Need a recommendation on a good phosphate test kit. I have an API, but it always reads 0 no matter what. The LFS today used one that you add a powder to water then compare.

I took a sample of water from the RODI holding tank and a sample from the DT. The RODI was showing .2ppm, but has 0 TDS. The display has about .7ppm. So my water changes are not diluting as much as I thought.

I need the test kit to find my PO4 issue with my RODI and monitor the PO4 drop in the DT.

Thanks for the help,
 
I have the Instant Ocean Test Kit.

This is the one with packets filled with powder.

I have used this with success, and this is also what one of my LFS uses in store.
 
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