Review on RV Level Gauge Cleaner 19 by Kyle Hoes

Our gray and black gauges almost don't work anymore. We stayed at a campground with very high iron levels. It seems that they slowly stopped registering normally. Then we had to stay in the same warehouse for 4 months - that's the longest downtime in 4 years. You have completely stopped registering. We bought this and tried 1/2 bottle but were advised to put it down before travelling. It didn't help. Then we finally hit the road and poured the rest. Voila! He cleaned the gray tank. Now we are happy vacationers again.