Ozonator - watched your recent "not liked" aspects to your present van build. No need to add more water supply ... maybe? Simply have a ozonator machine or similar uv product treat the used shower water and have it cycle back to the "shower only supply"? Work with a company that makes the product you might like to provide a review for and request expert recommendations for your situation? I'm living my youth vicariously through your little snippets. Love watching your videos. Water treatment topic would be great for your viewers ... I do believe. Happy Trails!!