2 Units Aquarium Fish Hatchery Isolation net, Aquarium Fish Breeder Tank Isolation Hatching Net Box, a Large Aperture net and a

You can reduce or increase the stone in the net to control the floating level the product will be.If the product sink and is not floating which means that there are too many stone in the net and in this case,you need to reduce some stone in the net.PLEASE READ THE SIZE OF THIS PRODUCT CAREFULLY TO SEE WHETHER IT WILL BE TOO BIG FOR YOUR AQUARIUM OR NOT.PLEASE REMEMBER TO PUT THE STONE IN THE MIDDLE OF THE BREEDER NET AND THERE ARE SOME STONE WHICH WILL COME WITH THE PRODUCT,PLEASE PUT THEM IN THE MIDDLE OF THE BREEDER NET.