Eheim streamon 4000 streaming pump with magnetr the eheim streamon has the added bonus of adhering to your aquarium wall with the use of a magnet preventing any risk of the pump from being dislodgedr with eheim streamon you have more flexibility than with any other streaming pumpsr eheimrsquos streamon 4000 streaming pumps are suitable for use in both marine and in fresh water aquariums they are small highly efficient and energy saving you can position them vertically or horizontall