Hanna InstrumentsHI774-25 Phosphate Ultra Low Range Checker HC Reagents (25 Tests) by wwG Store

Easy to use and accurate , but kinda pricy

Dosing phosphates in my reef tank, I want to know that I'm not overdosing or under dosing. The Hanna checker is easy and the results with these reagents are consistent and accurate.

Follow instructions exactly and it will work perfectly

Great replacement that still has plenty of time before they expire. Would recommend.

Not too sure how this works. My husband ordered it, but he didn’t complain so it was good for our fish tank.

Not quite as accurate on the lowest end, which is where I typically want to measure.

Good product, just what I needed to test.

Fast shipping and good quality