Water Gardening: On the shady side of the fish pool, 1 by baagrant

baagrant wrote:
The moss attaches to some of the stones on the overflow also. This narrow ripple stream allows the excess water generated by our water-source heat pump to get down to the catch basin (a large garbage can sunk into the ground with a sump pump), there to be pumped through a cartridge swimming pool filter (from a yard sale) back up to the natural water fall or to just flow on into the ditch and away. We dug this pool by hand in the early 1990's, lined it with 4 layers of black construction plastic (bought a large roll, laid it out flat and folded it). Raccoons and the sun have damaged the outermost layer but the pool still functions fine. The koi and goldfish are still here, though we've learned the hard way(dead fish) to make some improvements--The horizontal spray--which started the moss growing happily.