Trigger Systems has been building exceptional sumps since 2003. They employee engineering in their sumps that make them nearly unmatched in dependability. They use rounded corners instead of square corners which exponentially increases the strength of each and every sump. One of the reasons Trigger is our favorite brand here at ClickCorals is they use the strongest material to ensure your sump will last for the life of your aquarium. We are the nations premier Trigger store. We carry every color choice and sump variation that Trigger offers - Triton Method, Crystal Clear, Sapphire Blue, Ruby Red, Emerald Green, and Amethyst Purple. These unique color choices aren't just for appearance. They also play a role in preventing unwanted algae growth.