BioGuard Algicide 28-40 is used to prevent algae growth in your swimming pool. This economical algaecide may foam and may not be used with spa treatment or in pools with attached spas, water features, or jetted returns.
16 oz per 25,000 gallons of water.
4 oz per 25,000 gallons per week.
Application for Swimming Pools:
Ensure all pool equipment is working properly. Clean or backwash filter following manufacturer's directions. Adjust pH to between 7.2-7.6. In outdoor chlorinated pools, add stabilizer to establish a minimum level of 30-40 ppm to reduce the degradative effects of sunlight upon the chlorine residual. Check for metals and if present add a stain and scale inhibitor to prevent staining of pool surface due to metal. Maintain sanitizer residual in accordance with label directions found on your sanitizer of choice. This product is effective in controlling the growth of green and blue-green algae. When using other products as outline in directions for this product, always follow directions on those products.
For an initial application pour directly into deep end of pool at a rate of 16 fl oz of this product per 25,000 gallons of water (2ppm).
Pour directly into deep end of pool at a rate of 4 fl oz of this product per 25,000 gallons of water (0.5ppm) every 5-7 days depending on weather and use factors. After each rain of consequence, add 4 fl oz of this product per 25,000 gallons of water. Even when the pool may not be in use for periods of time, algicide additions must be made since a heavy accumulation of algae growth is difficult to remove.
Recirculation accomplished by running the filter will assure rapid dispersion of product. Wait at least 15 minutes after application before entering pool.