OK, so let's be clear about a few things here first.
First, the EPA only recognizes three (3) chemical methods for sanitizing a swimming pool - chlorine, bromine, or biguanide/peroxide. That's it. The reason being is that those chemicals are the only ones that can provide enough of a sanitizing residual to effectively kill pathogens and limit disease transmission. Nothing else is capable of doing that. Now, it is also true that EPA regulations ONLY apply to commercial pools; as a residential homeowner you are free to "sanitize" your pool however you want. If you want to do psychic dances around your pool and wave power-crystals over the water to dispel "evil spirits", that's entirely your choice.
Now, as to the Oxygen Pools stuff - I have reviewed what little technical information they have on their website, which is intentionally vague so as to make everyone believe that they have something special, and their product is nothing more than an ozone generator. The chemicals they have you add to the water are either percarbonate and/or perborate solids (these are borates and carbonates that have peroxide adducts) along with clarifiers and other chemicals. Any liquid products you are adding is basically nothing more than pH-stabilized peroxide that one would find used in a baquacil pool. They also utilize UV light in conjunction with peroxide to create higher levels of oxidizer.
To be clear again - ozone is not considered an approved sanitizer because, no matter how large a cell you make, pool water will not hold enough of a residual to keep the water sanitary. There is no way to stabilize either ozone or peroxide long enough in an outdoor pool environment to make it a useful sanitizer. It can be used to oxidize bather waste, but bather waste does not cause disease transmission. The only way to have a pool with a sanitizing level of peroxide in it would to be have such a high concentration of peroxide, well over 100ppm, that the water would be uncomfortable to the point of painful to swim in. If the ozone residual level were high enough in a pool to be an effective sanitizer, you would have such a high level that the environment around your pool would violate air quality standards for ozone levels. Again, there's nothing stoping you from creating a pool with massive amounts of peroxide and ozone it, that's entirely up to you.
Now, the Oxygen Pools people like to tout on their website how their product is "Registered with the EPA" and "Registered with FIFRA" and "UL Approved"....that is all bogus marketing hype! I can create a product that lets me add methane to my pool and then register that device with the EPA telling them that I've built a pool water methanator and I can claim under FIFRA that my product will kill certain bacteria and should be registered as a "biocidal agent" and then I can have my device looked at by Underwriter's Laboratory (UL) to have them confirm that I've built an electronic device that complies with their safety standards. But none of that is proof that my fictitious methanator device will keep your pool sanitary. However, the minute I claim that my device is a pool sanitizer, I would be in violation of federal law and I would have to either PROVE that my device is a pool sanitizer OR I would have to make a disclaimer in very fine legalese print that my device is actually NOT a sanitizer and a pool owner must use an approved sanitizer, such as chlorine, to ensure a protective residual. You see how sneaky that can be?
So, bottom line is this - TFP makes no claims regarding your oxygen pool. If you think your system is not working, that's between you and your pool builder. TFP claims that the only known ways to effectively sanitize a swimming pool is to use one of the EPA's approved chemical methods. TFP claims that chlorine is the best way to keep a pool sanitized. Everything else has problems that makes a pool NOT trouble free.