Water Chemistry

I recently purchased a Hanna phosphate meter to test my reef as I was having some algae issues that I haven't had. So after testing I found out I had a high phosphate issue readings of 3.4 or higher each time. So I thought I would address it first by liquid control using Phosphate RX which I purchased from marc which I've had good luck with in the past. So I dosed the RX as directed which is 38 drops after that I waited 24hrs to retest and not feeding tank to not alter the test readings. Well me ...