I beg to differ. I installed UA about ten months in the past and I am surprised by its effectiveness. In particular the prop is sparkling thoroughly clean - begin to see the pic - about five months of it was in tropical waters, the shiny places are bare steel https://hyperbaric-oxygen-therapy94714.goabroadblog.com/34846080/the-single-best-strategy-to-use-for-oxygen-chambers-for-healing