Via Aqua submersible pumps are good quality, at a very good price. They are very durable and will pump in less than 1" of water, making them ideal for hydroponic use. We sell 3 different models. The Via Aqua 302 has a 1/2 output and will move up to 130 gallons per hour. The Via Aqua 305 has a 1/2" output and will move up to 315 gallons per hour. The Via Aqua 306 has a 3/4" output and will move up to a 526 gallons per hour. They come with a 6 month warranty.