These black halibut pellets can be used dry through a feeder, a common way is to use the 4mm version through a maggot feeder which allows the scent and a slow trickle of pellets to come out, washing over the downstream hookbait.
They can also be used through a mesh feeder or River feeder simply by dampening them down with water. Place the required amount of pellets in a tub and pour over a little water, just enough to coat the outsides of the pellet and give them a good shake. Then allow 30 minutes for the water to be absorbed into the pellets shaking them every 5 minutes to make sure the water is distributed evenly through the pellets. The pellets will soften slightly allowing them to be squeezed into a mesh feeder.