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?

 

[snipertwobe]

if you are talking about just running raw water in then out. i would say no problem. might have a little ca added in the form of dust. but if you are running the co2 could be a bad idea as you could spike your alk or drop your PH in your tank. which all leads to worse things.