The difference between those with pyramid problems and those without is where your toilet dumps into tank, mine is on the shallow side, so solids sit untill tank is half full, those that dump into the deep end don't have problems. A 30gal. tank can be 6" deep on one side and 3" on the other. We added a spray flusher like one used for the kitchen sink to spray the paper before dropping into the tank. Helped to solve our pyramid problem. Dump waste first with minimal water, wipe, spray tp and most breaks up untill bowl is full then drop fast to break up solids bellow.