Garage pond filtration - we use a ProfiDrum RDF with a FlowFriend pump running the water to a shower. The system will filter 13.2k gal per hour. : r/Aquariums
ProfiDrum Combi Bio 30 at Absolute Koi - YouTube
ProfiDrum Eco 45/40 RDF Filter – Koi Acres
Children of the Sun Koi - Products - ProfiDrum Eco 45/40 RDF