Acute HD nurse- training for CRRT, apheresis, etc

Hello all,

I have been an acute dialysis nurse for a couple of years now and wondering how much different is CRRT/CVVH therapy? I would love the opportunity to train in these settings, but haven't yet found that chance. I've heard that apheresis is also a great sub specialty to get experience in. Can anyone give me some insight into the similarities, differences, and about how long the transition might take? Thanks!