We have been using our FlexWash two years without an Aqua Pebble. I only today realized that some people have been able to get them through this forum. Is it possible to have one sent to us?
We are sorry to hear about this. Since the unit is outside of the warranty, you can purchase an Aqua Pebble from samsungparts.com.
I believe the website calls it a detergant case. Part number would be DC61-04468A.