Toilet bowl water is consistently low. Water in tank is fine but water in bowl gets low numerous times daily. What can be done?

Here is what you need to do, remove the lid from the toilet water tank check the small refill black or white tube to be connected to the overflow tube, make sure it is not inserted too much into the tube, see the images below, Thanks.

John

Toilet bowl water is consistantly low. Water in tank is fine but water in bowl gets low numerous times daily. What can be done?

Please explain farther. Are you saying the bowl fills and then looses water? If so how long does it take to go down? Or does it just never fill up to a normal level? B ack to you, Tom