Thanks ReiningChick when you start your own background keep us updated.
Today I bought a TMC Pond Clear Advantage 25W UV steriliser
The UV steriliser was then plumbed in at the same time as my spare Eheim Pro 3 (2080)
The tank is nicely over filtered now and seems to be benefitting from the increased turnover already with less debris being allowed to settle on the substrate.
I really can't wait to get the weir box and sump installed :-D