Tomorrow were leaving for home (about 70 miles) and thought I'd try again to get the black tank indicator to work properly. So far I've tried dishwashing soap, which did clean a lot of black gunk out of the tank but the indicator still didn't work. Also put in a couple of bags of ice on another trip, but to no avail.
Did order some Digest It and plan to put that in the tank on the return home trip. Based on all the advice posted on this forum, maybe I should try the Digest It, Calgon, dishwasher soap and ice all at once. I could throw in a King Cobra and a mongoose for a little action. In a fight always bet on the mongoose, I saw one take down the cobra on a nature show.
Kidding aside, any ideas on the best way to use the Digest It?