Ca reactor solenoid NO

[Giddyup]

Have Apex controlling solenoid for Co2 then top end needle valve. Ph probe in reactor. I think my co2 cylinder may be getting low and getting no bubbles after solenoid cycles or a rapid bunch ? Does anybody run minus the solenoid and just trust needle valve once set to ph equal or above target setting? Thinking perhaps the old Milwaukee solenoid is gunked up?

 

[Eckolancer]

You are having issues I was having at first. Or issues I had after it was up for a while.
Newly setup you need to program the apex to turn on when it's low and run then put a min time off for say 5 mins so that it's not turning on and off a lot. Now if you have had it for a while the needle valve might be going bad. When mine started doing that I bought a new needle valve and it resolved the issues. I would never trust a slow bubble count what if for some reason it gets bumped and you come home to very low ph and melted corals.