Penn Plax Net Breeder for Aquarium ISOLATE THE FRY: the Net Breeder Deluxe is the safe way to keep your fry isolated in a community tank. IMPROVED DESIGN: nicknamed the baby saver, the new design has an improved net and frame, with more features. FREE SLIDING SUCTION CUP: allows the Net Breeder to adjust by itself and float at water level. PERFECT SIZE: the frame measures 6.75 x 5.50 x 5.75, the perfect size for your little ones.