Have seen a video somewhere on how to check toilet paper to see if it is RV safe. Take a few squares of unused toilet paper, place it in an old plastic milk bottle, fill half full with water, shake the bottle. If the paper breaks up into pieces it is said to be RV safe. Another hint I saw on this video is when you drain your tank fill it with some water and add a liberal amount of Dawn dishwashing detergent to tank. Have tried both of these and have had no issued, and am here to tell you the odor is 100% better.