OK, the waterfarm system isn't supplying the halo with water. You have a bubbler and not a water pump. The halo serves a purpose, and seeing how you paid for this "system" you might want to buy a water pump to fully utilize what you have here. That halo is meant to spray-drip oxygenated water from the bucket to the hydroton 24-7 hours a day. DWP is different from DWC. Both have a bubble air pump. But one of them has a water drip from the bucket to the halo. And yes, because it runs 24/7, this means you don't have to top your water near as often.
Don't those use an air pump to force water into the drip ring? I thought that was the design?
Is it hooked up right? How does it running 24/7 help with having to top up the Res?
Peace.
Tav.

