Hi,

I would just use the AM 1000 when it arrives and run it with at least a 300-400 gph separate pump based on the size of your tank. Then your UV flow will remain as is and you won't have to modify it...

You want a decent amount of current through the reactor so the c02 mixes well. I know the flow of UVs can vary at beginning and end of life, so this may affect how your c02 is mixed with the water........

You can then run a piece of tubing from the gas release vent on the AM 1000 back to the INPUT of the reactor pump to simulate a venturi loop. Check out this article:

Dual venturi DIY External CO2 reactor


I run a 500 gph mag drive to my AM 1000 for a 180gal which is 1/2 MPT.

To connect:

1 barbed MPT of the diameter appropriate to the Fluval
1 barbed MPT of the reactor diameter
1 FPT coupler that matches the MPT threads

The MPT sizes must match to use the coupler.


This was EZ to do, so please give it a try

The output of the reactor can be fed (if possible) back to the main pump for distribution to the tank.

Pic 1 of connections
Pic 2 of valve release line on the AM 1000 which is to the right of the pic....

Hope this helps.