Calcium Reactors ???

[NAS]

yup the reactor sits outside your sump (usually). You don't normally connect it to your sump.

Most come with their own re-circulating pump that pushes the water in the chamber through a side arm where it's mixed with the co2 and back into the reaction chamber.

The feed is usually gravity siphon through airline hose, and same with the return.

Usually connect the reactor chamber to a monitor or a controler that will turn on and off the co2.

Absolutly no way or reason to connect to your main pump. Not like a skimmer. You need the seperation and drip to de-gas.