How to Identify & Treat Pool Algae Fast

Swimming Pool Algae Identification

Objective

This guide helps you accurately identify the specific type of algae blooming in your swimming pool and provides the exact, results-oriented steps to eradicate it quickly.

The Biology of Pool Algae It is a common misconception that all pool "algae" are the same. In reality, the informal term "algae" covers a wide variety of photosynthetic organisms and bacteria. By understanding the unique biology of the growth in your pool, you can stop wasting money on the wrong chemicals and execute a precise, surgical strike to clear your water.

Prerequisites

  • Ensure your pool pump and filter are fully operational.

  • Have liquid chlorine or granular shock on hand to activate your specific algaecide.

Step-by-Step Instructions: Identifying and Treating Your Algae

1. Green Algae

  • Identification: Green algae typically appears in pools with extended periods of low sanitizer levels. It is not easily brushed off and is quite smooth or "slimy" to the touch.

  • Treatment: For heavy, neglected blooms, turn your Pump Switch to the ON position. Add the recommended dose of Swamp Treat™ directly to the water, followed immediately by a heavy dose of chlorine shock. Run the filter continuously for 24 hours.

2. Yellow / Mustard Algae

  • Identification: Yellow algae often begins in the shadiest areas of the pool, starting at the base of a wall. It easily brushes off but returns quickly.

  • Treatment: Add the recommended dosage of Yellow Treat®2 directly into the pool, focusing on the shady areas. Immediately broadcast your chlorine shock to activate the treatment.

3. Black Algae

  • Identification: Black algae actually consists of cyanobacteria with a very dark blue-green color. It appears as small black buds on the surface and is nearly impossible to brush off.

  • Treatment: Because black algae has thick gelatinous cell walls, it is highly resistant to oxidation. Treatment requires utilizing a strong algaecide like Swamp Treat™ and superchlorinating to break through its defenses. Vigorously scrub the buds using a 50/50 stainless steel and nylon brush.

4. Pink Algae ("Pink Slime")

  • Identification: Pink Algae is actually a reddish bacterial growth. It appears as a gelatinous slime that easily wipes from surfaces, often growing around pool fixtures and behind pool lights.

  • Treatment: Scoop out large masses of growth from behind lights and fixtures into the pool water for treatment. Treat using a strong algaecide like Swamp Treat™ and superchlorinate.

Troubleshooting Note: Keeping it Clear Once your pool is clear, don't let the algae return! We highly recommend using a preventative algaecide like No Mor Problems®. Adding just 5 ounces per 10,000 gallons when you add chlorine prevents algae from starting and provides crystal-clear water.

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