Now, EHEIM streamON+ is even better. The new EHEIM streamON+ is incredibly energy-efficient, small, and compact. The pump is easily adjustable on the glass and is fastened to the aquarium with a magnetic holder. A variable slider can be used to control the outflow capacity, and the ball joint enables the flow outlet to swivel in all directions (3D function). The EHEIM streamON+ streaming pumps' benefits Three models of small streaming pumps for aquariums ranging in size from 35 to 500 liters Both fresh and marine water can use it. Perfect for mimicking the natural flow of water in coral reefs, rivers, etc. Water circulation at its best for a smooth, natural flow creates natural living conditions by raising the oxygen content. essential and advantageous for corals in marine environments