What test kit for phosphate , while dosing silicates ?

[Yanir34]

Hello , part of multi approach to attack dinos in my reef tank mainly in the sandbad (Amphidinium) , I'm starting dose of brightwell sponge Exle .
I heard that measuring PO4 with hanna ULR will give unacurate results, while dosing silicates .

What test kit for PO4 will be reliable , for this purpose?

 

[Randy Holmes-Farley]

The interference is small. I recommend the Hanna for phosphate.