Selling a 20 Gallon Green Trigger Systems Sump: Link: https://www.bulkreefsupply.com/emerald-cube-sump-20-trigger-systems.html Asking $300.00, would prefer pickup only but if your really that interested in it being shipped. PM me. I bought it 6 months ago. After 3 months of having a 24x24x30" tall tank I found out how much I hated the tall box dimensions and decided to get a 180. I also decided to build that tank with the triton system so I bought the triton sump.