Used non work Ecotech Marine S1 aquarium pump complete. sold as is/parts only! Pump was working fine, then started running intermit-tingly, then stopped! Tried to re calibrate it with the EcoSmart live software and no success! This is the second time this has happened and it was sent into Ecotech last time for them to fix it. At this point I am done with their pumps completely! My loss, your gain! Again will be sold strictly for parts only with no refunds!