PH of 8.5/8.6?

[G7subs]

I just checked the PH of my 40 gal long and I was kind of shocked.I found the PH fluctuating between 8.5 and 8.6! I know the target PH is 8.2-8.4.Any ideas why? How bad is this? All my animals look fine.

I add kalkwasser 24/7 as make up water thru a kent float valve.Alkalinity is 12.5, Calcium is 390. 4" DSB,reverse photo period Refugium w/ feather caulerpa.My main tank has quite a bit of Sargassum in it.

 

[percula]

Not a bad thing... its in the ballpark, that and your test kit could be reading high or low, so dont worry...