Supa 18" Condensation Tray provides a physical barrier between the aquarium water and the electrical fittings. Fish can be fed without removing the cover. Electrical wires can be kept together. Actual dimensions of what is referred to as a 18" x 12" Condensation Tray is 44cm x 30cm. Can be easily cut to fit your aquarium, if required. High quality plastic condensation trays are particularly ideal for tropical fish tanks that produce condensation. Supa have manufactured condensation trays at their UK factory in Sheffield for over 30 years.