A common test suggested for septic tank owners---
"How to Check Your Toilet Paper for dissolvability?
There are many different types of toilet papers — but not all toilet papers are created equal. Some dissolve in water faster and more completely than others and, as such, are more suitable for your septic tank.
This DIY toilet paper test is ultra easy and allows you to see what happens when you flush down your favorite tissue without having to open the septic tank lid.
Take four sheets of your toilet paper and place them in a jar or a Tupperware container
Add two cups of water and wait 20 minutes
Stir the jar or Tupperware container for roughly ten seconds. Now let its content settle down
Did your toilet paper dissolve? If yes, congratulations — your tissue is septic friendly!
If it didn’t, perhaps it’s about time you dump it in favor of a toilet paper that break down quickly."
