Rocks and Co is not being taken over by Juwelo, they are the same company.
Juwelo was formed when the old Gems TV Germany left the country. They operate in the UK under the Rocks and Co brand, if you watch Juwelo Germany you often see Tony or Tenna Diniz presenting with a translator. Juwelo also have a channel in Italy.
Quite honestly i think that Rocks and Co graphics, music and studio is far more superior than Juwelo anyway.