I'm not sure if this has been posted before, but you can build yourself a nice bottled CO2 injection system for under $130 (not including tank/gas) and never make a trip to "the store". Most of the parts can be found online from an aquarium supply store. If anyone is interested I'll write something up.

ETA: Forgot to add, if you have the $$ you can replicate the CAP monitor as it is just a repackaged GE unit.
TestPilot Reviewed by TestPilot on . DIY CO2 I'm not sure if this has been posted before, but you can build yourself a nice bottled CO2 injection system for under $130 (not including tank/gas) and never make a trip to "the store". Most of the parts can be found online from an aquarium supply store. If anyone is interested I'll write something up. ETA: Forgot to add, if you have the $$ you can replicate the CAP monitor as it is just a repackaged GE unit. Rating: 5