The Eco-cooler, 44 watt with thermostat controller.

The water flows down into the sump compartment where it tees off to 2 pipes.

One pipe delivers water to my eco-cooler via a rotating spray-bar, this sprays the water over a rolled-up filter mat. 2 axial fans then cool the water as it drips through the filter media. This then exits to flow over my dsb and into the skimmer compartment.

The 2nd pipe delivers water directly into the skimmer compartment and has a ball valve fitted to control the level of water in the weir.