Drain the dirty water right into the sink and refill the aquarium with ease...no more need for heavy, messy, unwieldy buckets! Water changes refresh your aquarium with previous nutrients and remove excess debris such as turtle waste, uneaten food and decomposed plant matter. Twenty-five percent water changes should be performed at least once a month in order to maintain a healthy aquatic turtle enviornment.With its efficient 7 to 1 suction ratio, cleaning your tank uses about the same amount of water as flushing your toilet. Cut your aquarium maintenance time in half! Complete, ready-to-use system No buckets, no siphons, no mess! No tank tear down EVER again!