ISTA Hang-On External Breeding Box is great for breeding fishes and shrimps or for isolating sick fishes. Gaps in lower platform allows baby fries to drop to the bottom. Easy to maintain and helps water changes without affect fishes in the box. Can be used for freshwater or marine water tank.

To use, connect to an external air pump. Water will overflow back into main tank, keeping the water in breeding box clean for your aquatic pets.