Pumps do as they say on the box. Its better to know the height and the distance you want to pump water before choosing a pump. Or simply match the ###LPH number on the pump you are replacing. Water with a high level of Oxygen is needed for plants or simply to keep water fresh. For this reason a lot of people 'Bubble' their water when storing in tanks or in Hydroponic systems. This is done by simply attaching an air stone to an air pump using some hose that we supply also.