"Not sure if anyone has ever used the Cascade Complete packs for this but it worked and worked GREAT! Black water holding tank was stuck at telling me that it was 2/3 full when I knew for a fact that it was empty. After this last camping trip I put Cascade to the ultimate test. Here is what I did. Empty tanks, then put back about 15 gallon of clean water and added several gel packs to tanks. Drove home (about 30+ miles) giving the water a good sloshing and time to work. Emptied both tanks and filled again with clean water to rinse. Both tanks now give perfect readings as to the amount of waste water in each! Sensors are cleaner than they have ever been!! Thanks Cascade for cleaning the ultimate dirty mess!"
