[titus]

Hello,

You need:

1) Calcium Reactor + Media (of course)
2) CO2 bottle
3) CO2 Regulator + Needle Valve + Solenoid (Optional)
4) pH monitor (Optional but highly highly recommended)

You can get the CO2 bottle from JL Aquatics. The rest of the items you can either get it from Canreef or JL.