I don't have the Hydros set up yet. The new tank is just running bare bones at the moment. I am running a WaveEngine and OctoPulse 2s on the old tank right now because my billion year old Jebaos finally kicked the bucket.
My used tank came with an X3 and an XP8. When mhurley got out of the hobby, I bought his components from him and got an X2, WaveEngine, and I think an XS. I also got the following from him: the 2 OctoPulse, fish feeder, rope leak sensor, skimmer sensor, and a couple other ancillary things. There's something I'm forgetting because I know I have 6 controller components.
I still want to build a controller board for it all.