Swimming pool water that's contaminated by algae is a serious issue that requires immediate action. For one, algae-contaminated pools are useless when it comes to swimming. For another, algae in pools often leads to potentially harmful bacteria growth. To rid a swimming pool of algae, you treat it with a product such as Algae Guard. Algae Guard is an all-purpose swimming pool algaecide. The recommended dose of Algae Guard algaecide is also expressed in gallons per a given amount of water.
The specific brand of algaecide known as Algae Guard is made by HTH, a swimming pool chemical products company. Algae Guard is effective against most types of algae that manage to contaminate a swimming pool. Algae Guard is added to an algae-contaminated pool at 1 gallon per 50,000 gallons of water. An 18-foot-wide by 4-foot-deep pool, for example, would need almost 20 oz. of Algae Guard to effectively destroy a pool algae contamination.
To figure out the actual dose of Algae Guard for a swimming pool, you need to know its volume. An 18-foot by 4-foot-deep round above-ground pool's volume, for example, is 7,646 gallons (18 x 18 = 324 x 4 = 1,296 x 5.9 = 7,646.4 gallons). After you've figured out your pool's volume, determine its algaecide dose next. You must know a swimming pool's actual volume before adding any chemicals to it to make sure you don't add too much.
Determining the Dose
If the dose for Algae Guard algaecide is 1 gallon in 50,000 gallons of water, 19.60 oz. of Algae Guard algaecide is needed for a 7,646-gallon pool (50,000/7,646 = 6.53, then 128/6.53 = 19.60 oz.). Convert gallons to ounces to figure out less than gallon-size pool chemical doses — for example, 128 fluid oz. in 1 gallon. Pour Algae Guard algaecide directly into your swimming pool to treat it. Algae Guard added to your pool will be circulated by its filtration system.
Several different types of swimming pool algaecides are available on the market, and all come with different dosing and usage instructions. HTH Algae Guard is a quaternary, or "quat," algaecide. In addition to being strong algae killers, quat algaecides are effective algae preventatives for swimming pools. HTH Algae Guard comes as a 10-percent solution. Add 1 qrt. of Algae Guard algaecide per 50,000 gallons weekly as a maintenance dose to prevent the reappearance of swimming pool algae.