i still have my 180 gal up and if you are facing it i have a 125 gal "fuge to its right. my boiler/waterheater sit between the two tanks. before i had a dart pump water over and then gravity feed back. now that the wife has decided that that will not work anymore i cant gravity feed. would the alternative be to put another dart or similar pump to bring the water back over from the fuge back to the sump now that gravity is no longer an option? does anyone need clarification on what i tried to convey here?