Is there anyone who has a similar issue with the Apex PH probe and manual testing equipment...I keep getting alerts from the Apex saying the PH is low, 7.61 but when using the Red Sea test kit, I get around 8.2? I have calibrated the PH probe two times now and get the same result. Any suggestions? I know, the ORP is high, that is another problem to understand how to keep that lower. Also, the ALK is low because I have not calibrated the Trident yet.