My apologies, let me clarify: Waterbox Aquariums offers the Eden line of aquariums, and on their website you can buy either the tank itself, or a bundle which includes the tank + AI Blade + Sicce EKO 200. However, the 40 gallon kit which measures at 31" long comes with the 21" AI Blade in the bundle. My comment was instead of buying the bundle, I'll probably buy the tank separately so that I can get an adequately sized light for the tank. Sorry for that confusion 🙂