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It sure has been a great privilege and journey, the only think I have modified is the light moved the rock stir the sand I just tested my alk it was 12 every week I have to do a water change to get my cal and alk down, I haven’t been using my calcium reactor it has been off from couple of days I I am afraid the water inside the cal reactor will go bad should I run it for 1hr every day without co2
Yeah you can run water through your CaRx without any CO2 and that shouldn't be an issue at all.