Looking for input on different CO2 monitors.

What works, what doesn't? I can't break the bank on this one. I need some solid input.

I'm currently running a 20lb tank with a titan controller in a 10x10x8 room, with no way to check CO2.

I'll probably grab one of the plunger testers while I save up some cheese.

Anybody own one of these? http://www.hydroponics.net/i/137969

I use the Titan Atlas 1 controller its light sensitive and has a digital monitor that displays your PPM. Fucking thing is awesome basically plug and play. All you have to do is adjust your flow rate and thats it.

Right on. I appreciate the response.

Cost is an issue with that Atlas. I already have the regulator on a 30min timer that comes on 30 min before lights on, then off for 30 on for 30. Works well to fill the room before lights on. I just don't know what my ppm is.

Might just try that $100 unit.

edit: I went ahead and ordered it. I'll post feedback next week.