System comprising a pump attached to a tank casing for mixing a fluid

A system for mixing a fluid, comprising:

• a tank conduit suspended in a tank from a top of the tank for receiving a mixture comprising a liquid, wherein the tank holds the mixture;
• a rigid casing comprising a plurality of sides configured to surround the tank;
• and
• a pump attached to the rigid casing, the pump comprising a suction inlet and a discharge outlet which is suspended in the tank from the top of the tank, wherein the pump creates a negative pressure that draws the mixture into the pump through the suction inlet and the pump creates a positive pressure that dispels the mixture out of the pump through the discharge outlet;
• wherein the tank conduit is in fluid communication with the suction inlet such that the mixture flows through the tank conduit and the suction inlet when drawn into the pump;
• wherein the mixture is discharged from the pump into the tank through the discharge outlet;
• an external fluid inlet attached to the rigid casing for receiving the liquid, wherein the external fluid inlet is in fluid communication with the tank conduit;
• and further comprising a three-way valve in fluid communication with the external fluid inlet, the suction inlet, and the tank conduit.