Check the listing for details. Baquacil Algidefense Algistat (8 2oz Packets) 2 Pack (Boxes). Condition: New. Listed at 59.99 USD. Baquacil Algidefense Algistat (8 2oz Packets)Part #84346/22 Pack BAQUACIL AlgiDefense (2 oz) is designed for long lasting protection again mustard algae growth in your pool. This long lasting product only needs to be applied once per month.DosageStart Up:6 oz per 10,000 gallons of water.Maintenance Dose:2 oz per 10,000 gallons of water per month.DirectionsAdd product either directly to pool or though the skimmer while pump is in operation according to the dosage chart.Pool Opening:To prevent visible algae from growing in your pool:Add Start-UP Dosage of Baquacil Algidefence to establish level needed to begin protecting your pool.Continue with Baquacil sanitizer system treatment.Maintenance - Monthly:Monthly add Baquacil Algidefense per the dosage table, or take water sample to your Baquacil Dealer to test for Baquacil Algidefense.If Baquacil Algidefense is less than 0.5 ppm add a Start-Up dose; if level is greater or equal to 0.5 ppm add a maintenance dose according to dosage table.IngredientsZinc Sulfate Monohydrate: 98%, Other Ingredients: 2%Returns are not accepted on opened or used products unless covered by an RMA/RGAIf you have any questions, please feel free to contact Clearview Fireplace and PatioWe would be happy to help Disclaimer: I will follow all applicable federal and state laws and regulations regarding the sale of the pesticideI won’t accept bids from, sell to, or ship to states in which the pesticide is not registered as a general-use product