Me and a buddy just checked the 713 and 736 on his tank and mine.
His tank measurements
713 = 0.00
736 = 2
My tank measurements
713 = 0.00
736 = 11
So they are different and show based off the numbers ran above. I am going to be buying a 736 Hanna checker just to help me lower phosphate even more.
So what does that equate to? You're reading 11 ppb on the 736, right? I can't remember the equations but I believe your po4 is already really low
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