This fish breeding box aquarium creates a separate space inside an aquarium for betta fish, helping keep adults and fry apart during breeding and early growth.Use this breeding box for fish in home aquariums, fry observation, or breeding betta fish aquarium isolation. The suction cups help position the mesh enclosure along the tank wall while keeping the fry visible.Each fish breeding net box uses nylon mesh and includes a DIY assembling design. Compared with placing fry loose in the main tank, an isolation box for betta provides a defined area for monitoring and feeding. The set includes 3 pieces, each measuring 16x14x15CM.Rinse the mesh before first use and assemble all parts securely. Press the suction cups onto a clean, smooth tank surface. Check the enclosure regularly, maintain suitable aquarium conditions, and remove the box if the mesh or attachments show damage