I agree there. The use in humans vs pets though is much more rigorous, and strict for approvals. I wouldn't be surprised if they did use it that way. It would have its toxic points in those type reactions, and some not as. I guess I'll leave the rest alone.Reacting ammonia is one of the approaches we tried. It's complicated to get it to happen safely, and since commercial materials are not available to do so without having nasty stuff loose in the aquarium, I think it unlikely anyone has used such a complex technology.