For sake a used Santa Monica RAIN2 algae scrubber. Easy to mount and run.
Full high spec with 4 GEM red lights of perfect spectrum to grow algae.
Find out more about algae scrubbers, also called turf scrubbers via google.
The idea is that you grow nuisance hair algae in a perfect environment, to save it growing in your marine reef aquarium. It takes up all the phosphates and nitrates.
Ready to use. UK plug. Comes with water pump.
Listed on ebay starting bid £50. Cost me over £300 a few months ago. Check out the listing via link below.
2nd link is for the main algae scrubber forum, where all the enthusiasts hang out ... very interesting :-)