i purchased the 18' easy set (bubble pool) with the SWG and the AQUAquick sand filter from wal-mart.com. all at once and it bolted right up no surprises. i asked a lot of ?? before i purchased. i run my SWG about 6 hours a day its on its own outlet and the pool filter is on a timer. i got the 3/4 HP one i think it is (the bigger of the 2) and its is awesome. i have to adjust the SWG occasionally depending on weather and usage but i dont think i ever went below 4 hours. my only complaint is i cannot skim and clean the inside of the pool simultaneously. other than that goodbye to 30 minutes maint a day whew.