How to import plexus animation from houdini?

Hi,

I am trying to create a plexus animation as part of a scene which will be viewed in VR.

I have used this tutorial to create the plexus animation : - YouTube

However, when I import this as an alembic or FBX my framerate drops to something totally unusable (5fps)

Is there a way to import this as a different file format ? Or is this possible in cascade or niagra.

I am very new to unreal, but I have not found anything that seems to work online and I’m not sure if I’m missing something !

Thanks in advance !