The Turbelle® masterstream are electronically speed-controlled pumps operating on safety extra-low voltage of 12 V to 24 V. They can be used ideally for water circulation, wave action or wave-and-tide simulations. The models 6512 and 6515 come with Multicontroller 7096.The Turbelle® masterstream are electronically speed-controlled pumps operating on safety extra-low voltage of 12 V to 24 V. They can be used ideally for water circulation, wave action or wave-and-tide simulations. The models 6512 and 6515 come with Multicontroller 7096.