water marks from a camera?....
pfff, ok... people drop from forums all the time, life takes precedence. Everyone just needs to move to where it's legal, go legal, and post more pictures (worth 1000 words) AND videos (worth 30,000 words,... a second!) and then we can all really learn what to do. Going back into the closet sure as shit isn't an answer.
As for RO, i gave it up for growing years ago, still drink it though, it does taste better, ha,.. but learn to work with your tap water for growing and you'll never have the annoyance again