Great idea using manure to create heat in the winter. Terrible idea having the water container so low to the ground where (any of the chickens I've ever owned) scratch the ground and kick anything and everything here, there and onto and into everything in the coop.
If you've go enough shit to fill a much larger hole, I imagine you could bury a 25' hose in the shit and circulate your water through it with a small solar powered pump. People with horse sell manure in large enough quantities to handle such a pit - you might also create the equivalent of the 25 foot hose using 1/2" PVC pipe and fittings.
If you've go enough shit to fill a much larger hole, I imagine you could bury a 25' hose in the shit and circulate your water through it with a small solar powered pump. People with horse sell manure in large enough quantities to handle such a pit - you might also create the equivalent of the 25 foot hose using 1/2" PVC pipe and fittings.