2.5.3 Determination of weight of fish feed hopper This is calculated using equation 3 according to Akinfiresoye et al., [9]. Weight of fish feed = Mh × g (5) Where, Mh = Mass of fish feed in the hopper and g = Acce leration due to gravity. The weight of fish feed that can be accommodated into the hopper at once is 33.6N.