Well hot dry summer is just around the corner so I wouldn't count on rain too much. I just hope I can keep most of the water I already have and top it off with nice fall and winter rains later on this year! Cheezy can you explain to me in some detail how you rigged the trash pump to spray. Did you apply to banks or just pump it right into the water? I think i'm just going to rig a trash pump and spray it into existing water. Too much trouble to go around and cover entire bank area since my pond is on a steep grade.