Hanna 713 or 736 checker?

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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Curious as to why you would want to lower it more? I know SPS guys that run higher than that on purpose.

I have very little algae growing in my overflow. So I think my reading is false and probably higher then it's showing. Also I am an SPS guy.

ImageUploadedByTapatalk1417883005.074823.jpg
 
That's like a free ats right there! Do you run a fuge with macroalgaes?

No fuge, just skimmer and biopellets. I also don't do water changes. Been since March since last one. Unless you call selling corals and letting ato top off then every couple weeks add salt.
 

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