Drop a few sheets in a jar of water, shake for 10 seconds. If it breaks into small bits or a loose pulp, it breaks down quickly.
For these to work, avoid pouring bleach, antibacterial soaps, or drain cleaners down the drain—they kill the helpful bacteria. what breaks down toilet paper quickly
This is the safest and most effective long-term method for breaking down TP and waste. Drop a few sheets in a jar of water, shake for 10 seconds