Recirculating biopellet reactor design question

[morgank]

I want to mod my biopellet reactor to be recirculating, so I can add a valve to the output and reduce how much effluent goes into the sump. The most common design I've seen is people tee'ing off the output and redirecting it back to the feed pump. Is there any reason not to just send it back into the reactor though a uniseal in the body?
I'm thinking the only possible negative of this method is potentially disrupting how the flow in the reactor works.

 

[Salty1962]

I'd plumb the output into the bottom of the reactor then put an affluent tube on top to feed back into your tank. BRS sales them, Skimz I believe.

 

[morgank]

Thanks Salty, I've got the Accel Aquatics Fr-45, which is a pretty interesting design, it has a dish at the bottom and uses an actuator in the body to keep everything moving It works really well as long as the actuator is perfectly perpendicular to the bottom. There isn't anywhere below the plate to plumb it into and I don't want to mess up the flow of the actuator. I think I'm going to start by just trying to send it back in to the feed, which is coming off my return pump anyway. I can do that without putting any holes into the reactor.

 

[Shigshwa]

My question would be.. Where does the pump get water from, then? If the input of the pump were from the sump directly, then It would only be able to take in water as fast as the output of the reactor into the sump. Then, you wouldn't have enough flow in the reactor to churn the pellets.