I bought 2 -100 ft black hose. I leave the hose on all day on sprinkle. It comes out 104 degrees all day. In the spring time after I vacuum the pool and it’s 8 inches low I connect the hose to the hot water from out side shower. It has to be a lot cheaper to get that hot water from my house hot water tank. The black hose is like a solar panel. It works great.