Hi Tyler,
rust in the hot water only says the hottie is rusting out, but strange that you are getting different amounts out of different taps, doesn't make any sense
Never had the high water alarm activate, it runs on a 12 volt system that is charged by a trickle charger on a time clock each day. I test it about once a month or when I think of it. I find the fish oil works best as it actually bonds with the rust. The Zinc based paint is good but it only goes where you put it, the fish oil travels around corners and in between lapped joints. Once it has dried fully that is when I paint the Hydroseal over it and that virtually makes a new waterproof skin on the inside, so water then should not come in contact with the water again
