It was suggested to me in the beginning to put about 4 to 5 gallons of water in each of the gray and black tanks along with the Eco Smart holding tank additive after each dumping. The sloshing from water movement when under way keeps "stuff" moving in the tanks.
We refill the fresh tank before departure so the tires are not supporting as much dead weight while in storage.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Tuson TPMS, disc brakes, 16" tires & wheels