Dan,
If you were to follow the Geo Treatment directions using clean water, and also using a clear sewer fitting to monitor the water color and solid waste coming from the tank I would guarantee that you will be surprised at what has been building up and laying on the bottom of the grey tank. It will be black in color and very slimy. It is basically a mixture of soap scum, hair and food particles that have entered the tank and then coagulated on the bottom, and with the tank always open, it never has a chance to flush away with a good powerful dump. It will continue to buildup until one day you will experience possibly a sensor not working correctly or some other problem. Without accurate sensors, I would be left in the dark as to when to dump or not. Then usually most people that have useless sensors will end up dumping way too often causing even more problems.
If you have ever taken apart any home sewer system at all, and have seen what is laying in the bottom of those pipes, it is basically the same king of "stuff". Black slimy crap entangled with hair and food particles.
It just makes sense to alleviate any possible problems that one can with these finicky RV's.
Dr4Film ----- Richard.
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