Applied Biochemists Algaetrine – Fast-Acting Algaecide, 1 Qt

Stop Algae Fast and Keep Pool Water Crystal Clear

Take control of algae growth with Applied Biochemists Algaetrine, a powerful, fast-acting algaecide trusted by pool professionals and homeowners alike. This 1-quart concentrated formula targets and eliminates visible algae blooms—green, black, and mustard—while also preventing regrowth for weeks.

Formulated for use in all pool types, including concrete, plaster, vinyl, fiberglass, and painted surfaces, Algaetrine works quickly to clear cloudy, green water and restore brilliant clarity without affecting chlorine balance or pH levels. It’s the perfect solution for both routine maintenance and treating active algae infestations.

Powerful, Professional-Grade Algae Control

Algaetrine contains quaternary ammonium compounds (“quats”), a proven class of algaecides that disrupt algae cell membranes, killing growth on contact. Within hours of application, you’ll notice a visible improvement in water clarity as algae cells break down and are captured by your pool’s filtration system.

Key Benefits

• Fast-acting formula clears green water quickly.

• Prevents future algae growth with weekly maintenance use.

• Compatible with chlorine and bromine systems.

• Non-foaming when used as directed—safe for spas and fountains.

• Won’t stain pool surfaces or alter water chemistry.

The result is cleaner, safer, and more inviting pool water with less work and fewer chemical imbalances.

Designed for All Pool and Spa Types

Whether you manage a backyard pool, commercial facility, or spa system, Applied Biochemists Algaetrine provides broad-spectrum protection against:

• Green algae (common surface and waterborne types)

• Mustard/yellow algae (wall-clinging forms)

• Black algae (stubborn, deep-rooted growth)

Its balanced formula is safe for:

• In-ground and above-ground pools

• Vinyl, fiberglass, and gunite surfaces

• Saltwater and chlorinated systems

• Spas, fountains, and decorative ponds

Quick Treatment and Easy Maintenance

Applied Biochemists Algaetrine is designed for fast, simple application and can be added directly to pool water.

For Existing Algae Blooms

1. Brush all pool surfaces to loosen algae.

2. Backwash or clean the filter.

3. Add 4 oz per 10,000 gallons of water directly to the pool (near return jets).

4. Circulate for 24 hours, then vacuum and re-balance chlorine levels.

For Weekly Prevention

Add 2 oz per 10,000 gallons of water weekly to maintain long-term algae control and keep water sparkling clear.

Pro tip: Use after heavy rain, high swimmer load, or extreme heat—conditions that promote algae growth.

Gentle on Pool Surfaces, Tough on Algae

Unlike copper-based algaecides that can leave stains or discoloration, Algaetrine’s non-metallic formula is safe for all pool finishes, liners, and equipment. It won’t interfere with filter media, stain surfaces, or damage chlorinators.

Its low-foaming formulation makes it suitable for both residential and commercial pools, including spas and fountains that use high aeration.

Complements Your Regular Sanitizer Program

Algaetrine enhances, not replaces, your existing chlorine or bromine program. By attacking algae directly, it helps your sanitizer work more efficiently and reduces overall chlorine demand.

The result:

• Fewer chemical adjustments.

• Longer-lasting sanitizer levels.

• Improved water clarity and quality.

This synergy means you’ll spend less time balancing and more time enjoying your pool.

Expert Tip: Pair with Shock Treatment for Maximum Results

For severe blooms, apply Applied Biochemists Algaetrine immediately after shocking the pool. The chlorine oxidizes organic matter while Algaetrine destroys algae at the cellular level—giving you complete, same-day results and faster recovery from cloudy, green water.

Safe, Tested, and Proven Effective

All Applied Biochemists products are tested under stringent quality standards and are EPA-registered for safe use when applied according to directions. The Algaetrine formula is free of metals, phosphates, and harsh residues that can damage pool components or alter water chemistry.

Product Specifications

How to Know When to Use an Algaecide

Algae growth often begins invisibly, especially in warm weather or after heavy rain. Signs you need to use Applied Biochemists Algaetrine include:

• Green or cloudy water

• Slippery pool walls or steps

• Mustard-colored stains or patches

• Increased chlorine consumption

• Recurring algae despite regular brushing

Regular algaecide use prevents these problems before they appear, keeping your pool water balanced and clear.

Storage and Safety Information

Store the 1-quart bottle tightly closed in a cool, dry area away from sunlight and incompatible chemicals. Always follow the label for dilution rates and safety precautions. Avoid contact with eyes and skin and keep out of reach of children and pets.

Why Choose Applied Biochemists Algaetrine

For more than 60 years, Applied Biochemists® has been a leading name in pool and spa water treatment, trusted by aquatic professionals for precision formulations that deliver results.

The Algaetrine formula offers a perfect balance of strength, safety, and simplicity, making it a top choice for both routine care and emergency cleanups. It provides professional-grade performance without the staining, foaming, or chemical complexity of other algaecides.

Buy with Confidence from Benchmark Pool Supply

At Benchmark Pool Supply, we carry authentic Applied Biochemists products used by professionals nationwide. The Algaetrine 1 Qt Algaecide is one of the most effective treatments for fast-acting algae control—safe, dependable, and compatible with every pool system.

We offer fast shipping, verified product authenticity, and expert customer support, so you can maintain a clean, beautiful pool all season long.

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Frequently Asked Questions

How do I use Applied Biochemists Algaetrine?

Add 4 oz per 10,000 gallons of pool water for existing algae, or 2 oz weekly to prevent future growth. Always brush and circulate water for best results.

Is Algaetrine safe for saltwater pools?

Yes. Algaetrine is completely saltwater-compatible and won’t corrode salt cells or alter chlorine generation.

Can I swim after adding Algaetrine?

You can safely swim 15 minutes after application when the product is evenly dispersed and the pump is running.

Does this product foam?

No. Algaetrine is a low-foaming, non-metallic algaecide, making it safe for spas, fountains, and high-aeration systems.

What types of algae does it kill?

It effectively treats green, yellow (mustard), and black algae—including stubborn wall and surface growth.