Is this OK?

[JurisHP]

I finally got my Ca reactor up and running. Right now, I have the circulation and the feed pumps on to get things going and to purge the dual chambers of air. Both chambers are filled with ARM. Is there a downside to letting the water flow from the reactor into my sump w/o dialing in the Co2?

 

[DaveK]

For a day or two to purge it, it's no big deal, but once purged, you should use CO2 and run it normally.