This is hands down the best hot tub water treatment option on the market. I waited 6 months to add my review because honestly, I kept waiting to make sure it would work long term. It does!! My father-in-law got a bad rash when he purchased his new Bullfrog hot tub 6 months ago so I spent hours upon hours researching different chemical options. I purchased ionRx for my tub to see how this option would work. We were very impressed from Day 1. Clear and great smelling spa water! After a lot of flack from our local Bullfrog dealer we ended up determining his tub shipped from the Bullfrog factory with a biofilm that had already grown in the waterlines prior to us recieving the new tub (which we later confirmed and returned the tub for a new one). However, we liked the ionRx so much that we stayed using it. Believe me there isn’t a hot tub store that I know of that would recommend this option because they would lose tons of money in the other chemicals they sell as no one would by them (ie: shock, bromine, chlorine, natural enzyme, stain and scale, water clarifier….. Have I forgotten any???) pH up and down and Alkalinity up are the only chemicals you need with this option other than the ionRx and chlorine tablets that come as a kit (I recommend ordering the kit on your initial order so you get the floater and chlorine tabs). Our tub looks and smells amazing and I only do the chemicals every Sunday with the ionRx system (I am super picky and OCD about my hot tub water). It’s very simple and a great product that anyone with a hot tub should be using. I also use a mineral cartridge that goes in the filter compartment along with a scum bug floating sponge to absorb body oils but those are just additional steps that I take because I’m picky as heck. ?