10/01/2026
https://www.facebook.com/share/p/1QGNQBkKfC/?mibextid=wwXIfr
You've probably heard this one before: dump a bag of ice into your RV's black tank, add some water, and go for a drive.
The idea is that the ice will slide around inside the tank, scrub the walls, and knock loose stubborn buildup.
RVers have recommended it for decades. In fact, I STILL see it regularly suggested in comments.
But a few people have actually tested the method using clear tanks and cameras so they could see exactly what was happening while the vehicle was moving.
How much does the ice actually move? Does adding more ice help? And how much of the cleaning comes from the ice versus something much simpler?
We looked at the tests and what they found.
Full article in the first comment.