OOOHHHH! yah know what...you very well may be right about that. one does fit in there quite perfectly. is that an option on Ca reactors usually? it's seems to be a compression type fitting, the more i tighten the nut on top, the more it cinches up on whatever is stuck into it! what do ya think?

At the risk of confusing you more...

The CO2 line should go...into the bottom of the bubble counter, then out of the top of the bubble counter and into the highest fitting that is near the pump.

The input water line goes into the other fitting that is right near the pump.

The output water line connects to the top 1/4" JG fitting. I notice that the valve is sitting on the table beside the reactor. That valve is usually installed right into the top of the reactor. If the valve were installed, the output water line would be connected to that valve.

If you don't have a pH probe, you'll need to close that other, larger hole at the top of the reactor.

Yes...that is certainly what that is.

the other port at the top of the chamber is for a ph probe. the co2 enters into the JG fitting at thetop of bubble counter and then the co2 enters the recirc chamber for the pump from there. the water in is at the bottom nearest to the pump.

then there ya have it!! now that all makes sense to me...i appreciate all your help on this guys.

so then i hook up my pH monitor and set it somwhere between 6.6-7?

around 6.5 to 6.7. depends on the media you are using. some media will turn to mush at lower ph but i'm using reef bones and have hit 6.3 in my chamber and the media is ok. just watch your media and your tank KH and CA and adjust from there. remember when you make adjustments, make small adjustment and give it a day before checking your parameters again. keep a chart going as to drip effluent to bubbles co2 and then you can compare how drastic of adjustments give you so much KH and CA readings, if that makes sense.

funny thing is...i just found out this isn't a myreefcreations reactor after all. so i have no idea who made it. the box said CR-1 on it and that's all, no instructions, no nothing else! anyone recognize it? :)

where did you buy it from? it really looks like a marinetech reactor to me. i could be wrong though but it looks identical to mine but smaller

you're right Colin, talked to Jason from Proline and got the full scoop...

Thanks Jason for your excellent service!