Optimum aeration rates for the suspension of larval feeds

Abstract

This short paper explores the suspension of food particles in larval rearing tanks and is concerned in particular with optimum aeration rates for a variety of tank designs and sizes, ranging form 5–1800 litres in volume and particle densities and diameters in the range 0·50 – 0·85 mm. The quality of the suspensions produced, quantified by the concentration of particles suspended in water, was determined as a function of the degree of aeration and it is concluded that there is a clearly defined optimum aeration rate for a given tank size and that, in general, the required aeration rate per unit volume of tank for satisfactory suspension of feeds is lower with larger tanks.