use this stuff(Read the directions)to get it cleaned out and then follow the advice of the other posters on black tank usage moving forward.
Unique Natural Products RV Digest-It Holding Tank Cleaner, 128-Ounce
http://www.amazon.com/Unique-Natural...+tank+digester
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2007 Ford Expedition Limited w/Tow package & 3.73 Rear end
Equal-i-zer & Prodigy
2015 Keystone Outback Terrain 250TRS
DW, DD Circa 2002, DD Circa 2005
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