In some cases, the bottom of the bag will be sealed by the manufactures leaving an opening at one end only for putting in or taking out stock. Some growers are now finding suppliers for already constructed bags and cages in standard dimensions and mesh sizes. It is important to consider handling efficiency in these systems which can be greatly increased by using pins that can be set or removed quickly. A simple rack used with bags or cages. The bags are used in a variety of ways and for different stages of culture.
Bags can function as intertidal nursery rearing systems for clam or oyster seed of sufficient size.
This is usually done only on firm gravel substrate. Sediment is allowed to penetrate the bags and cover the clam seed. The bags must be flipped regularly to control fouling of the upper mesh surface. The cage is pinned onto the substrate and gradually sinks into it until it is half filled. The clams bury themselves in the substrate but are still completely protected from predators.