A system for detecting and indicating variations in volume of chemicals in a container is provided. The system includes a retention basin configured to retain the container. The retention basin includes a pressure cell, a basin input interfaces, and a basin controller. The pressure cell is configured to measure a weight of the container. The container is placed on the pressure cell. The basin input interface is configured to allow specification of properties of the chemicals in the container. The basin controller is configured to calculate the volume of the chemicals in the container based on the measured weight of the container and the specified properties of the chemicals in the container. The basin controller includes a basin display configured to display the calculated volume of the chemicals in the container.