u/inhaleBanana

I follow a WaterGuru on Yt to install water softener on my bathtub with on the go rv softener and a weddel filter. For the first 4 days, it feel great no more itchy on skin but after that it came back and I thought it just me. While i search for more information on filter, I think I may have chlorine rash, I also read that weddel filter don't last that long. Is there any solution for longer filter that remove/reduce chlorine?
Second question: 1st picture with delta hydrorail very weak compare to the second shower (both have restrictor remove)? is it because of the way setup for delta hydrorail?