Reactor for Sump Return

[LightingBamboozled]

I currently have a 250L (150 x 46 x 46) filtered by two TetraEX1200's. I have seen a deal on an 800L system 183x61x61 with a 107x43x43 Sump. PVC plumbing can be included and adapted.
Currently I run CO2 using an inline diffuser. That's obviously not going to fit in the pvc plumbing. I really don't like in tank diffusers so what options do I have?
Also any advice on a first sump tank welcomed.

 

[hypnogogia]

You could run the sump return on a bypass through a reactor.

 

[seedoubleyou]

You could probably get away with just having a diffuser in the return chamber of the sump. Providing it has enough time to dissolve i don’t see why co2 rich water would then be pumped back into the tank.

 

[LightingBamboozled]

You could run the sump return on a bypass through a reactor.

Any suggestions on reactors? Or a DIY guide? I'm a little intimidated by the whole process if I'm honest.

 

[bazz]

Reading through this will be food for thought with regards to CO2 injection on a large tank..

Olympus is Calling.

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[bazz]

Removed, double post.