Biorb 30 tropical is a great way to incorporate a traditional fish bowl look with a tropical aquariumr the 30 litre fish bowl incorporates a clever and easy to change 5 stage filtration system that has been designed to provide maximum benefits to both fish and fish keeperr manufactured from super strong plexiglass acrylic biorb 30 provides fish with safe environment that is approximately ten times more space than a traditional bowlr biorbs stylish globe shaped design will prove an eye catch