Building Kalk Reactor. How did you attach your MJ400?

[cwegescheide]

Hi there I am in the process of building a Kalk Reactor. I've got everything done, drilling the holes and put the Uniseals in and have 1/2 pvc mounted in it.

The easy part is I know 3/8" ID poly tubing will work fine on the nozzle part of the MJ powerhead and a barb fitting coming out of the PVC will work like a charm. Now the intake side, what ID tubing do I need? I guess I should just take my powerhead to Loews tomorrow.

Any good closeup pics of how you mounted yours to your Kalk reactor? I'd appreciate it! Or good closeup pics of a Geo reactor would be great.

Thanks,
Chris