Have 2017 ace 29.4
Same problem also no matter how much water before or after #2 it stacks up
After 1 day use I have to use a brush to break it up I bought at Wally mart in plumbing area 2" round 2' long and a handle 2 'long
Never had this problem with any of my other rv
Thor should step up to the plate and design a new tank and recall crap tank
Thor engineer must never went to the bathroom in any of there units
Or they would have fixed this crap tank
( Tanks Must of look good on paper but in real life works like shi???? )
I thought in my golden years I wouldn't be still cleaning up crap
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