Single to dual regulator transition?

[kris2001]

I'm currently using a MRC calcium reactor with a single regulator.

If I use this used dual regulator ....will it be better ?any advice on this type of dual regulator? Thanks...

 

[Semisonyx]

I can’t tell what kind of regulator that is, but dual is definitely better than single to prevent end of tank dumping. Your other option is to keep the single stage and attach a solenoid on the outflow line that’s attached to a milwaukee pH regulator or your apex in order to shut off the CO2 if your reactor pH gets too low.