Abstract: The present invention comprises methods and compositions for controlling the pH of a confined body of water, such as a swimming pool, spas, and hot tubs, using an organic acid specifically citric acid alone or in combination with other organic acids, borates or boric acid or other chelants or clarifiers. The amount of organic acid added to the confined body of water is determined relative to the pH of the water prior to such addition and the volume of water being treated. The amount of maintenance doses of organic acid is based upon the volume of water being treated and the magnitude of pH change required for adjustment to desired pH. The organic acid can be dispensed automatically or manually and can be dispensed as a solid, including a dispersable powder form, a capsule, or tablet, or as a liquid concentrate to be diluted in the confined body of water.

Abstract: A conveyor system for carrying a conveyor belt. The conveyor system includes a first module having a frame and an elevator assembly including shuttles positioned on opposite sides of the belt and movable relative to the frame between a first position, in which the upper surface is positioned to move product along the belt, and a second position, in which the upper surface is spaced a distance from the belt in a direction substantially normal to the travel direction to remove product from the belt. The conveyor system also includes a second module for supporting the belt and transporting product from an upstream end of the second module to a downstream end of the second module and a third module having a drive assembly for driving the belt across the first, second, and third modules.