Fiji drop in box for a 20 gallon long aquarium

Fiji DIY drop in box for a 20 gallon long aquarium. You can turn any 20-gallon long aquarium into a salt water aquarium with this built-in box. It can sit inside and be moved around for cleaning, or you can silicone it into place. I had it set up and running for 2 months, but I have decided to tear down my 20 gallon tank.It comes with a brand new sock filter and everything pictured.I only used the media basket. I paid 300 for it, and I'm asking 115$ impeccable for everyday use. excellent materials and excellent craftsmanship ensure long-lasting durability.