Hello everyone!
I connected my new P4 few days ago .
I did step by step about the installation , including calibration of each probe.
yesterday I also did firmware update for GHL control center ,to the latest version (7.28 version).
since day 1 until today the ORP is at 98 mv, PH is at 8.49 and don't change even at night.
My tank is new tank ,and I started it 7 days ago .
I'm in the hobby for the last 14 years and never had issues with equipment. any advice what should I do ?Screenshot_20220719-074254_GHL Connect.jpg