Easy installation: connect the mulmglocke (bottom cleaner) with the hose to the suction pump on the water tap. After vacuuming the aquarium bottom, switch the lever on the water tap pump to refill the aquarium. The mulmglocke is designed for cleaning in hard-to-reach places with its round cross-section and corner. This super practical complete set is ideal for partial water changes in aquariums with a height of 45-70 cm, using a water jet pump for the tap. The automatic suction device creates suction using a water jet from the tap, even if the sink is higher than the aquarium. No more dragging water buckets; enjoy an easier and safer water flow. The hose is secured by a hose clip and has a direct connection to the tap. The set includes: 1 complete water change set with an 8 m hose, a mulch bell 27-46 cm long, a thread adapter for 3/4'' to 22 x 1, 24 x 1, 28 x 1, and 2 hose fixing clips, along with 1 water jet pump.