Wavemaker pumps with DC controller allow for the ability to create customized water patterns similar to reef currents and river flows found in nature. Four operational modes: Continuous Flow Mode: Adjust either pump to flow from 40-100% of maximum power to eliminate specific dead zones or create more current for coral health. Tidal Mode: The two pumps are positioned at opposite ends of the aquarium. Pump A runs at maximum flow while Pump B runs at low flow for 12-hour cycle. The two pumps then switch speeds after 12 hours so Pump A runs at low flow, while Pump B runs at maximum flow, simulating a natural tidal ocean current. Turbulence Mode: Both pumps begin at the lowest flow settings and increases up to maximum flow, then power off for five seconds before repeating. The run time to get from the lowest to maximum flow can be adjusted from 10-60 seconds. Continuous/Turbulence Mode: Pump A runs continuously from 40-100% of maximum power while Pump B is in Turbulence Mode. Eliminates dead zones Improves water quality and coral health For use in salt and freshwater environments Available in 2600 and 5800 GPH flow rates Limited Lifetime Warranty