Connect your Apex Controller from Neptune to up to two Tunze Stream pumps.
It has 1 RJ45 connector which plugs into the Apex base unit and 2 Din5 connectors which plug into 2 Tunze Controllable Stream pumps.
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I love my fish tanks to be big and beautiful. Majestic have always gone the extra mile for me with my extra big tanks. I will keep coming back. - Frank Zoka