Put some water lilies in pots, plant them in a pot with dirt/with a inch layer of something like river rock to keep the dirt in. If u plant enough plants u wont have an algae problem. Then disconect your waterfall & if u have a pump in the pond put a riser on it. In the winter (if it gets cold there-in Idaho it gets -10 to -20 sometimes, & I will have snow in my front yard from nov to april sucks) throw in a horse troff heater. Not the floating kind u need the kind with a cage around it. Then when its cold quite feeding...if u feed in winter when cold the food will rott in then bellies because their metabolism slows way down. Hope this helps ive had my pond for over 12 years and some of the original fish r still in there.