Well, especially farbwerk 360 is not connectable to aquaero via aquabus

Though it has aquabus port in hardware, it is disabled in firmware.
But, you still can have RGBpx effects based on sensors values of aquaero. I have both farbwerk360 and aquaero and I can assure you it's possible to create effects you described.
If you decide to go with farbwerk360, you do not need anything besides farbwerk360's package contents and your LED ring's contents.
You also may consider going with Quadro or Octo, they have their own RGBpx output ports and can be connected to aquaero by aquabus.