Getwise.org - Toilet Leak Detector Tablets

To complete installation you will need:
• A parent or guardian
• Toilet Leak Detector Tablets — located in your Kit

Ask a parent/guardian to carefully take off the toilet tank lid.
Drop one tablet into the water in the tank (be careful to drop the tablet in the tank, not the bowl). You can use the second tablet to test another toilet in your home later.
Make sure the toilet is not flushed during the wait time.
Wait 10 to 20 minutes. If a blue color appears in the bowl, you have a leak from the tank into the bowl. Remember, if you do have a leak let a parent/guardian know so they can get it fixed.