When i do water changes i dont like to waste the water, so i normally just pump it to my lawn. ive been doing it probably spring. its really been great on my lawn!.... up until about the past week. i guess its too cold and the irrigation isnt great when its this cold outside. i average about 500 gallons of water changed per week. normally all on a sunday. probably not the best idea to leave it in the same spot. i went to do a water change today and noticed a nice brown patch where i normally put my output on my pump. and the grass is still wet.