NIDO 3.1 is a particularly generous threaded layer. The advantage of nets in net is that fry and future mothers are constantly having fresh, clean and rich in oxygen. Nido 3.1 is provided with a double bottom which allows the fish to take refuge in a safe place during the hours following their birth. Thanks to the central removable partition, you can use the Nido 3.1 layer to take care of two future mothers separately until birth. Nido 3.1 is also ideal for isolate sick, aggressive or oppressed animals.