How sump is useful in RAS fish farming?

The presence of waste in the tank increases the demands for oxygen and decreases the amount of dissolved oxygen content in water, thereby lowering the density of fish in the tank. A sump or a clarifier tank is used to collect the excess waste at a slow rate. The main idea of the sump is to collect and sediment all the solid waste which could otherwise the block the biofilter and use up the oxygen. This is isolated from a fish tank and should be periodically cleared. The shape of the sump should be ‘v’, so as to facilitate for easy cleaning.