Reduce energy cost by up to 75%, Lack of moving parts provides a very low maintenance alternative, Maintains higher dissolved oxygen(DO) levels, Allows for higher stocking densities, Allows for higher feeding rates, Allows for more frequent feedings, Faster growth and reduced FCR, Low start up cost, Low replacement cost, Reduce algae blooms, Easy maintenance: this product is lightweight, durable, easy to maintain., Size :16mm set