Trigger systems has released a relatively new line of sumps. The Ruby line which can be used as either a berlin or refugium setup includes 4″ diameter filter socks and up to 3 probe holder positions. The “ruby” comes from the color of red acrylic that is used to build the sump, and a piece is placed between the first section and middle section to block light. For larger aquariums systems, the Elite model includes a separate section for your protein skimmer and is designed to help prevent micro-bubbles. These sumps start at $270
