Description
Copper and Penetrating Agents for Deep-Rooted Black Algae
Applied Biochemists® Black Algaetrine® is specially designed to fight tough black algae. It combines copper with penetrating agents that get past black algae's protective layer to kill and prevent even the most deeply rooted growth.
Pair it with daily brushing for two days, and there is no waiting to swim after treatment.
Built for Black Algae's Defenses
Black algae roots into plaster and grout and hides under a waxy coating that shrugs off ordinary algaecides. Black Algaetrine pairs copper with a quaternary penetrating agent to reach the colony and kill it.
Brush, Treat, Vacuum
The label routine is simple: brush the spots, apply 12 oz per 10,000 gallons around the pool edge, brush once a day for two days and vacuum away the debris. Brushing breaks the protective layer so the algaecide can work.
Keeps It From Coming Back
Once the pool is clear, a 6 oz per 10,000 gallon maintenance dose every 5 to 7 days helps prevent black algae from returning, more often in hot weather or heavy use.
Key Features and Benefits
- Black algae formulaCopper plus penetrating agents.
- Kills deep-rooted growthGets past the protective layer.
- Prevents recurrenceMaintenance dose every 5–7 days.
- No waiting to swimPer Applied Biochemists.
- Sanitizer compatibleBromine, chlorine and ozone.
- Clear dosing12 oz per 10,000 gallons.
Product Details
| Product Detail | Information |
|---|---|
| Brand | Applied Biochemists® |
| Product Name | Black Algaetrine® |
| Size | 32 fl oz (1 quart) |
| Manufacturer SKU | 406303A |
| UPC | 785336163017 |
| For Use In | Swimming pools |
| Product Type | Copper and quaternary black algae algaecide |
| Active Ingredients | Copper ethanolamine complex 9.5% (3.07% metallic copper); alkyl dimethyl benzyl ammonium chloride 26.3% |
| EPA Reg. No. | 8959-14 |
| Visible Algae Dose | 12 fl oz per 10,000 gallons |
| Maintenance Dose | 6 fl oz per 10,000 gallons every 5–7 days |
| Water pH | Adjust to 7.2–7.8 before use |
| Signal Word | Danger (corrosive) |
How to Use
- Balance: Adjust pH to 7.2–7.8 with a test kit.
- Brush: Brush the black algae spots hard with a stiff algae brush.
- Apply: Add 12 fl oz per 10,000 gallons around the edge of the pool. Don't concentrate it in one spot. For a very dirty pool, vacuum, clean and scrub the walls first.
- Brush again: Brush once a day for the next two days, then vacuum the settled debris.
- Maintain: Once clear, add 6 fl oz per 10,000 gallons every 5 to 7 days, more often in hot weather or heavy use.
Important Compatibility and Safety Notes
Compatibility
Applied Biochemists lists Black Algaetrine as compatible with bromine, chlorine and ozone. Add it by itself directly to the pool water; do not mix it with soap, other cleaners or other water-treatment chemicals. Avoid contact with strong acids and oxidizers. Biguanide compatibility is not stated.
Safety First
Danger: corrosive. Causes irreversible eye damage and skin burns, is harmful if swallowed and may be fatal if absorbed through skin. Wear goggles or a face shield, rubber gloves and protective clothing. Toxic to fish and aquatic organisms. Store away from heat or open flame. Keep out of reach of children and pets, and always read and follow the full label directions and precautions on your container.
Why Choose Applied Biochemists Black Algaetrine?
Black algae needs a specialist treatment, and Black Algaetrine's copper-plus-penetrant formula is made for exactly that job.
Ideal For
- Plaster and gunite pools with black spots
- Recurring black algae
- Pool pros treating problem pools
- Chlorine, bromine and ozone pools
Frequently Asked Questions
How do I kill black algae in my pool?
Brush the spots, apply Black Algaetrine at 12 oz per 10,000 gallons around the pool edge, brush once a day for two days and vacuum the debris. Keep pH at 7.2–7.8.
Why is black algae so hard to kill?
It roots into the surface and has a protective coating. Black Algaetrine uses penetrating agents, and daily brushing breaks the coating so the algaecide can reach it.
Can I swim after using Black Algaetrine?
Applied Biochemists says there is no waiting to swim after treatment.
How do I keep black algae from coming back?
After the pool clears, add 6 oz per 10,000 gallons every 5 to 7 days, more often in hot weather or heavy use.
Is Black Algaetrine safe for salt water pools?
Applied Biochemists' product page lists bromine, chlorine and ozone. The EPA label allows a salt water compatibility claim, so check your container label.
Should I dilute Black Algaetrine?
Retailer directions call for diluting it in a bucket with at least nine parts water. Follow the method on your container label.