SAFE AND SECURE: Designed to fit safely and securely within your community tank for breeding fish or isolate babies. Designed with safety and durability in mind, the Penn-Plax Aqua-Life Deluxe Net Breeder is the perfect breeding solution. WHY YOU NEED IT: Small fish are easy to breed, but they often fight and eat their young, which is not something you want to happen! This is extremely common especially in schools of fish were you really need a seperate nursery for baby fish to grow and thrive without worry or fear of aggressive territorial behavior that can be displayed in community tank settings. WHAT YOU NEED: This isolation net and frame fit conveniently inside your existing aquarium tank (sold separately) to keep fry safe while they grow strong! This product requires an existing freestanding tank (sold separately) to be used. Product Type: The free-sliding suction cup back allows the net to adjust by itself and float at water level. This is a fin-tastic way to start growing your school the safe way! Measurments include: 1.5"L x 6.50" W x 5.25" H