Today we are taking a look into the flow of the Hydor Koralia 2450 GPH Third Generation Powerhead. The Koralia 2450 G3 pump is great for tanks that are 5-8 feet in length. With a lower profile than previous models, and new DMSS (Dual Magnet Support System) system getting flow where you need it has never been easier. Hydor has put new motors inside their third generation pumps which leads to more flow for every watt. The new Koralia pumps can also be hooked up to a wavemaker or controller and set to intervals of seconds to hours. Today we are taking a look into the flow of the Hydor Koralia 2450 GPH Third Generation Powerhead. The Koralia 2450 G3 pump is great for tanks that are 5-8 feet in length.