I've found this helps my pool at fall near end of season. I take the eyeball out of the return and direct the heated water at the bottom. The wind does not take all the heat off the top that way. Also no more cold layers near bottom. Maybe someone posted this idea before, but it's cheap with PVC pipe and fittings. No need to glue them, they fit snug. It will tend to mix debris off bottom of pool. The heat rises to top just like air. Also, I can close the external bypass ball vave at the heater without the the internal one open because reduced pressure .image.jpgimage.jpgI want to get a variable pump someday, but this one won't fail! It's over 20 years old! Kids will try and grab the pipe, but mine have grown and so have the neibors lol.