My IG pool came with an UV lamp ozone generator that was never plumbed in to the system. It was, however, electrically connected, so those expensive lamps come on any time the pump is running. If the wind is just right, when you walk by the equipment, you can definitely smell ozone. I've read all the posts here for and against ozone. And I figure that before I abandon this (rather expensive) thing, I may as well hook it up.
Rather than spend hundreds of dollars on the manufacturer's connection kit, which amount to nothing more fancy than a clear plastic rotameter, some tubing, and some fittings, I bought all the bits on e-bay and at the hardware store. The mfr. recommended installation is to run the ozone into a standpipe on the suction side of the pump. The standpipe existed, so I was able to connect from the ozone unit through the ebay-sourced 1 - 10 SCFH rotameter with valve, and into the standpipe. Mfr literature says this unit should run about 6 SCFH. That all works fine, and it's definitely sucking in air (something I tend to question on a pump, but whatever).
Now comes the problem... not all that air getting sucked in goes through to the pool. Some portion of it accumulates in the headspace of my cartridge filter. Can I just put a tee on the top of the cartridge filter and run a small bleed line back into the pressure side of things (say right after the heater before entering the pool/spa valve)? Would I need a valve in that line?
Final question, wouldn't an ozone system like this (that draws in air) be hooked up from the get-go to an eductor on the pressure side of the equipment? Wouldn't that avoid the problem of accumulating air in the cartridge filter?