We have been using regular SCOTT paper for about 7 years with no problems. In the last two months I noticed when I flushed the black tank I was getting tp that hadn't dissolved. this had never happened before. the last time out I hadn't dumped in 4 days and when I opened the black valve Nothing. I canceled the rest of the trip and came home prepared for a dirty job, but the trip home shook it loose. I dumped it in my garden and it was solid undissolved tp.
Idid the test with a sheet of tp in a glass of water. After an hour you could still pick up the sheet by one corner and it wouln't tear. I bought some RV tp from Walmart and repeated the test. After 5 minutes soaking in plain water you could not pick it up cause it would tear. I'm convinced,no more regular tp in my rig. A full black tank you can't dump ain't funny.