Varied ocean currents in the aquarium without any remote control, timer, transformers and/or wave-maker, this state of the art pump is plug and play. Seio Surge Pump simulates natural currents of the ocean that aid in coral growth and feeding. This pump is pre-programmed in all settings to gradually increase water flow from 1680-2840 GPH (6400-10800 LPH). The next generation in water circulation, Seio surge pump is the first pump in the aquarium industry that does not require any remote controller or transformer to run. Cycle Time: Low 5 seconds, medium 5 seconds, medium high 5 seconds and high 6 seconds. For 150-300L aquarium use Dimensions:12.5x7x8.3cm