As a solution, a hand water pump can be motorized. A submersible pump can be a long and cylindrical. Most cover pumps are electric and work much standard air pumps. This is suitable wells deeper than 25 feet. Reliability: Reliability is average for a pump in this price go. https://maybommini59258.ja-blog.com/12416150/fish-pond-pumps-don-t-let-your-pond-go-stagnant-and-your-fish-die