Well, I saw you had 24 views and no posts so i figure I will give it a go.
Jiffy plugs are a clay like stuff you start seeds in and then plant it in soil.
If you put them into your hydroton it will make a real mess in your res. and maybe clog water lines and or pumps.
So I guess you figured out by now you don't want to do this again right?
But how are you going to do it, well I just had a similar problem. I had clones in rapid rooter cubes and I broke the cubes apart and got down to just roots, I saved most of the roots, lost most the root hairs but then I put collars on them and into aeroponics so anything is possible.
Do you think you can wash most of the clay off then set them into the hydroton and water them real good for the first few days?
I bet you will be fine, I just set the roots into the hydroton and covered them.
These clones came out of my aeroponics tub and are going into hydroton. They are doing fine.