I recently moved and during my move i found my 3 way ball valve i use on my skimmer/co2 scubber was very corroded so skipped it during setting things up. This ball valve used to hold my ph verry tight between 8.3 and 8.4 now without it and my skimmer just constantly running through my co2 scubber the ph has risen alot and seems to still be increasing. In the past week ive used some bacteria products which did temporarily bring the ph back down. My question is how high is to high? Should i let the ph continue to get above 8.5 should i take the c02 scubber off line should i risk using the ball valve again?