Its a 75g tank mixed reef in my living room. Parameters tested yesterday are: Alk-9.3, Calcium-406, Magnesium-1490, Salinity-1.028, Phosphate-0 (api test), Nitrate-24, PH-7.75, Iron-0, Potassium-440, Iodine-0.06. If I leave the door open all day ph doesn't change. Although it does go up when I dose kalk,but only temporarily then goes back down. I would like to atleast get my ph up to 8. My resolution is I'm hooking kalk up to a dosing pump and grabbing a nice size air pump hook some bubblers up in the fug and steady dose kalk. Any ideas and/or what works for you would be greatly appreciated thankyou!