# Pool Algaecides | Green, Black & Mustard Algae Treatment ## **Stop Algae Before It Starts with Reliable Pool Algaecides** Few things ruin a pool faster than algae. Whether it’s green slime on the walls, stubborn black spots, or yellow/mustard patches, algae not only makes your pool look unpleasant but also consumes chlorine, clogs filters, and creates unsafe swimming conditions. That’s why **pool algaecides** are a key part of any maintenance routine. At Benchmark Pool Supply, we stock a complete line of **algaecides** to prevent and treat every type of algae. From weekly preventative doses to strong treatments for stubborn blooms, our algaecides give you peace of mind and crystal-clear water all season long. _Prevent algae regrowth with [Clarifiers](https://benchmarkpoolsupply.com/collections/clarifiers "Pool Clarifiers - Fast Acting"), maintain balanced water with [Pool Balancers](https://benchmarkpoolsupply.com/collections/balancers "Pool Balancers Collection"), and strengthen results with [Specialty Chemicals](https://benchmarkpoolsupply.com/collections/specialty-chemicals "Speciality Chemicals - Benchmark Pool Supply")._ * * * ## Why Use Algaecides? - #### **Prevent Outbreaks** – Stop algae from taking hold before it spreads. - #### **Save Chlorine** – Reduce the demand on your sanitizer by eliminating algae growth. - **Improve Water Clarity** – Keep water sparkling and inviting. - **Protect Equipment** – Prevent clogged filters and strain on pumps. - **Enhance Swimmer Comfort** – No more slippery surfaces or green-tinted water. * * * ## Types of Pool Algaecides ### **1\. Quaternary Ammonium Compounds (“Quats”)** - Affordable and effective for green algae prevention. - Foam when agitated, so best for routine use in low doses. ### **2\. Polymeric Algaecides (“Poly-Quats”)** - Non-foaming formula safe for pools with heavy use. - Long-lasting protection with strong preventative power. ### **3\. Copper-Based Algaecides** - Powerful against resistant black and mustard algae. - Delivers fast results but must be used carefully to avoid staining. ### **4\. Multi-Purpose Algaecides** - Combine algae control with clarifying properties. - Convenient all-in-one solution for busy pool owners. * * * ## When to Use Algaecides - **Weekly Maintenance** – Add a preventative dose to stop algae before it starts. - **After Storms or Heavy Use** – Replenish algaecide to counter new contaminants. - **When Opening the Pool** – Protect against algae growth as water warms up. - **During Closing** – Add algaecide to keep water clear through the off-season. - **To Treat Outbreaks** – Use strong formulas for existing green, black, or mustard algae. * * * ## Benefits of Regular Algaecide Use - **Peace of Mind** – Prevents the stress of sudden algae blooms. - **Cost Savings** – Reduces chlorine demand and chemical waste. - **Year-Round Protection** – Works in both warm and cool weather. - **Cleaner Pool Surfaces** – No slimy walls or steps. - **Better Swimming Experience** – Clear, fresh, inviting water every day. * * * ## How to Apply Pool Algaecides 1. **Test and Balance Water** – Ensure pH and chlorine are within the proper range. 2. **Circulate Water** – Run the pump to distribute algaecide evenly. 3. **Follow Label Directions** – Use the recommended dosage for your pool size. 4. **Reapply Weekly** – Keep levels steady for ongoing protection. 5. **Use Shock Together** – For existing algae, pair algaecide with shock treatment. * * * ## Tips for Maximum Effectiveness - Brush pool walls and steps before treating outbreaks. - Clean or backwash the filter to remove dead algae. - Use non-foaming algaecides if your pool has lots of water features. - Store algaecides in a cool, dry place away from sunlight. * * * ## Why Buy Pool Algaecides from [Benchmark Pool Supply?](https://benchmarkpoolsupply.com/pages/pool-supplies-fresno-clovis "Pool Supplies Pillar") - **Complete Selection** – Quat, Poly-Quat, and copper-based algaecides available. - **Trusted Brands** – Poolife®, GLB®, and other professional-quality formulas. - **Expert Help** – Guidance on choosing the right product for your pool. - **Affordable Options** – From budget-friendly to premium solutions. - **Fast Shipping Nationwide** – Get the right algaecide when you need it most. * * * ## ✅ FAQ – Pool Algaecides **Q: How often should I add algaecide?** A: A preventative dose once per week is recommended, plus after storms or heavy swimmer loads. **Q: Can algaecide replace chlorine?** A: No. Algaecide prevents algae but does not sanitize. Always maintain chlorine levels. **Q: What’s the best algaecide for black algae?** A: Copper-based algaecides are most effective against resistant black algae. **Q: Will algaecides foam in my pool?** A: Quat algaecides can foam, but Poly-Quats and many modern formulas are non-foaming. **Q: Do I need algaecide in a saltwater pool?** A: Yes, salt systems generate chlorine, but algaecides provide extra protection. **Q: Can I use algaecide during winter closing?** A: Yes, adding algaecide before closing helps keep water clear until spring. ## Products in this collection - [Poolife AlgaeKill Extreme Fast-Acting Algaecide 1 qt](https://benchmarkpoolsupply.com/products/poolife-algaekill-extreme-algaecide) - 39.99 USD - [Pool RX 99066 Mineral Unit for 20,000–30,000 Gallons](https://benchmarkpoolsupply.com/products/pool-rx-black-white-331066-20k-30k-gallon) - 94.95 USD - [Algaedyn Black Algae Treatment 1 qt – Professional Algaecide](https://benchmarkpoolsupply.com/products/algaedyn-for-black-algae-treatment) - 59.95 USD - [Applied Biochemists Filter Blaster 1 qt Pool Cleaner](https://benchmarkpoolsupply.com/products/applied-biochemists-filter-blaster-pool-filter-cleaner) - 16.95 USD - [Applied Biochemists Black Algaetrine Black Algae Killer](https://benchmarkpoolsupply.com/products/applied-biochemists-black-algaetrine-black-algae-killer) - 39.95 USD - [EasyCare Fountec Algaecide 8 oz – Fountain & Birdbath](https://benchmarkpoolsupply.com/products/easycare-fountec-8oz) - 21.95 USD - [Applied Biochemists Algaetrine Pool Algaecide 1 qt](https://benchmarkpoolsupply.com/products/applied-biochemists-algaetrine-algaecide) - 19.95 USD - [Applied Biochemists Swimtrine Plus Algaecide 1 Qt](https://benchmarkpoolsupply.com/products/applied-biochemist-swimtrine-plus-algaecide-1-quart) - 34.95 USD - [First Choice 4-Month Copper Algaecide 32 oz](https://benchmarkpoolsupply.com/products/first-choice-4-month-copper-algaecide-32-oz) - 19.95 USD - [Poolife Algaecide 90 Long-Lasting Algae Control 1 qt](https://benchmarkpoolsupply.com/products/poolife-algaecide-90-long-lasting-pool-algaecide) - 41.99 USD - [Poolife AlgaePhos Algaecide & Phosphate Remover 1 qt](https://benchmarkpoolsupply.com/products/poolife-algaephos-algaecide) - 51.49 USD - [EasyCare AlgaTec Pool Algae Remover 10064](https://benchmarkpoolsupply.com/products/easycare-algatec-pool-algae-remover-10064) - 41.95 USD - [Poolife® Super AlgaeBomb 60 – Non-Foaming Liquid Algaecide (60% Poly Quat)](https://benchmarkpoolsupply.com/products/poolife-super-algaebomb-60) - 26.95 USD - [GLB Swamp to Swim Green Pool Recovery 1 qt](https://benchmarkpoolsupply.com/products/glb-swamp-to-swim-green-pool-treatment) - 40.95 USD - [Poolife Back to Blue Pool Recovery Treatment 2 lb](https://benchmarkpoolsupply.com/products/poolife-back-to-blue) - 47.49 USD - [Applied Biochemists Staintrine Pool Stain Remover](https://benchmarkpoolsupply.com/products/applied-biochemists-staintrine-pool-stain-remover) - 23.95 USD - [Applied Biochemists Thio-Trine Chlorine Neutralizer](https://benchmarkpoolsupply.com/products/applied-biochemists-thio-trine-chlorine-neutralizer) - 18.95 USD - [Applied Biochemists Pooltrine 60 Algaecide 1 qt](https://benchmarkpoolsupply.com/products/applied-biochemists-pooltrine-60-algaecide) - 44.95 USD - [Applied Biochemists Algaetrine 2000 Non-Metallic Algaecide](https://benchmarkpoolsupply.com/products/applied-biochemists-algaetrine-2000) - 101.95 USD - [GLB Algae-X](https://benchmarkpoolsupply.com/products/glb-algae-x) - 29.95 USD - [Mustard Algae Plus – Yellow & Mustard Algae Treatment](https://benchmarkpoolsupply.com/products/mustard-algea-plus) - 32.95 USD - [Applied Swimtrine 7.4 Qt](https://benchmarkpoolsupply.com/products/applied-swimtrine-7-4-qt) - 28.95 USD --- > Source: [Benchmark Pool Supply](https://benchmarkpoolsupply.com/collections/algaecides) > Updated: 2026-07-26