Possibly, however I fear it will be difficult. If the tank is in the basement and the pipes have to run through the ceiling I assume the sump will be at or above the level of the tank (in a different room obviously but relatively above or at the level of the tank)? If the sump is above you can use gravity to drain it back to the tank, though will want a gate valve to dial in flow and avoid splashing/bubbles in your display. If they are at the same level, I can't think of a great way to get water to and from the sump at equal rates. . . I know people do remote sumps, however, so again I am sure it is possible (hopefully some of those folks can chime in). Also, and you may already be aware of this, but you will want to ensure your garage is climate controlled.