Sort of low pH?

[Derek Hill]

Hey guys, having a slight issue...I guess? My pH will not get above 8.03 at all. My "swing" you can see below is only around 0.3, but I feel like it's still too low.

Dosing with my apex - 4.5 mL of alk, 11.5 mL of calc (b-ionic 2 part)

90 cube with eshopps adv200 sump
All SPS except 4 chalices
A lot of fish - a bit over stocked but upgrading to my 180 in December (all are fat and happy)

Params...
Calc - 440
Alk - 8.6
Salt - 1.025
Mag - 1300
NO2 - 0
NO3 - 5ppm
PO4 - 0

 

[markalot]

Double check calibration but it's probably just high co2 in the house. I run my skimmer intake outside to help. I've dropped as low as 7.7 without any issue but I try and stay 7.8 or above.

 

[Derek Hill]

Double check calibration but it's probably just high co2 in the house. I run my skimmer intake outside to help. I've dropped as low as 7.7 without any issue but I try and stay 7.8 or above.

Yeah...I am going to re-calibrate it tonight to make sure its correct. Not sure why it would be off, but who knows.

I am going to also look at adding a fan into my sump/stand to move air around better down there too.