PS your waterlily will provide some shade and help clear up the cloudy green algae you are seeing. Remember that algae (green pond) needs two things--sunlight, food--and if you deprive it of either (don't overfeed the fish, lots of plants to compete for the available plantfood, good water circulation through a filter--for example) and shade the surface with plants where you can, it will go a long way towards clearing up the water. Green water is actually sometimes a good sign that your pond is balancing itself. Try to be patient and not do water changes unless necessary (source of food in the form of minerals in the fresh water).Fish love green water, but it is rather annoying to those of us who want to actually see them from the surface !
