As with all pool products that depend on chemistry, sizing is important. Choosing the correct size unit based on total gallon is important. If you undersize the unit, it won’t work. If you over size / overdose, the minerals won’t have room to dissolve properly. Depending on the size you are supporting you may need to add additional Booster Minerals to support the total gallons of the pool. We need the right amount of minerals in the water to reach the level where algae cannot exist. See sizing chart.