The calcium reactor is a DIY using the plans found online by John Geisler. This was originally built for a previous 240g tank and even with it’s capacity and size we still need to supplement Alk and Ca.

The calcium reactor is fed off the same Sequence Hammerhead pump as the skimmer. Both chambers are 6” in diameter and x tall. We use a 10lb Co2 tank with a milwalkee regulator. Effluent exits the reactor into the skimmer output.