How to Use United Chemical Green Treat Algicide: Complete Guide

United Chemical Green Treat is a fast-acting algicide specifically designed to eliminate green algae from swimming pools. Add 1 quart per 10,000 gallons for treatment, brush pool vigorously, run pump 24 hours, clean filter. Works quickly to clear green water. This guide covers complete application procedures and best practices for green algae treatment.

What is United Chemical Green Treat?

United Chemical Green Treat is a specialized fast-acting algicide formulated specifically to eliminate green algae from swimming pools. This powerful treatment works quickly to kill green algae and clear cloudy green water, making it ideal for pools that have turned green due to algae blooms. Green Treat provides rapid results, often clearing green water within 24 to 48 hours when used properly.

Key Features of Green Treat

• Fast acting: Clears green algae quickly
• Specialized formula: Designed specifically for green algae
• Powerful treatment: Kills algae rapidly
• Clears cloudy water: Restores water clarity
• Easy to use: Simple application process
• Works with shock: Use alongside pool shock for best results
• Safe for all surfaces: Compatible with vinyl, fiberglass, plaster, and tile
• Professional strength: Used by pool service professionals

What Makes Green Treat Different

Unlike preventative algaecides used for weekly maintenance, Green Treat is a treatment product designed to kill existing green algae quickly. Its concentrated formula provides rapid results for pools that have already turned green, working faster than standard algaecides to restore clear water.

How Does Green Treat Work?

The Green Algae Treatment Process

Green Treat uses a powerful formula that attacks green algae cells, breaking down their structure and killing them quickly. When combined with shock treatment and vigorous brushing, Green Treat eliminates green algae and helps restore water clarity. The dead algae is then removed through filtration and vacuuming.

Benefits of Green Treat

• Kills green algae quickly
• Clears green cloudy water
• Works faster than standard algaecides
• Restores water clarity rapidly
• Easy to apply
• Works with all sanitizers
• Effective for severe green algae blooms
• Helps prevent algae recurrence when used properly

When to Use Green Treat

Ideal Situations for Green Treat

Green Pool Water:

• Pool water has turned green
• Cloudy green water throughout pool
• Heavy green algae bloom
• Water clarity severely reduced

Green Algae on Surfaces:

• Green algae coating pool walls
• Green algae on pool floor
• Algae in corners and steps
• Widespread green algae growth

After Pool Neglect:

• Pool turned green during vacation
• Algae bloom after equipment failure
• Green water after storm or heavy rain
• Pool opened green in spring

For comprehensive green pool treatment, see how to fix green pool quickly.

Step by Step Application Guide

Step 1: Test and Balance Water Chemistry

Before treating green algae, test and adjust water:

• pH: 7.2 to 7.6 (lower end is better for algae treatment)
• Total Alkalinity: 80 to 120 ppm
• Free Chlorine: Note current level (likely 0 in green pool)
• Calcium Hardness: 200 to 400 ppm

Learn about how to maintain your pool's pH balance and how to manage pool water hardness.

Step 2: Calculate Pool Volume

Accurate dosage depends on knowing your pool's water volume:

Rectangular Pools:
Length (ft) × Width (ft) × Average Depth (ft) × 7.5 = Gallons

Round Pools:
Diameter (ft) × Diameter (ft) × Average Depth (ft) × 5.9 = Gallons

Oval Pools:
Length (ft) × Width (ft) × Average Depth (ft) × 6.7 = Gallons

Step 3: Determine Green Treat Dosage

United Chemical Green Treat dosage guidelines:

Standard Treatment Dosage

1 quart per 10,000 gallons

Dosage Examples:

• 10,000 gallon pool: 1 quart (32 oz)
• 15,000 gallon pool: 1.5 quarts (48 oz)
• 20,000 gallon pool: 2 quarts (64 oz)
• 25,000 gallon pool: 2.5 quarts (80 oz)
• 30,000 gallon pool: 3 quarts (96 oz)

Severe Green Algae

For very heavy algae blooms, may need to double dose or repeat treatment after 24 hours.

Step 4: Shock Pool First

Critical step for algae treatment:

1. Shock pool with calcium hypochlorite or liquid chlorine
2. Use 2 to 3 lbs shock per 10,000 gallons
3. For severe algae, use triple shock dose
4. Add shock in evening for best results
5. Allow shock to circulate for 1 to 2 hours

Step 5: Add Green Treat to Pool

Apply algicide after shocking:

1. Shake Green Treat bottle well before using
2. Measure correct amount based on pool size
3. Pour Green Treat slowly around pool perimeter
4. Walk around entire pool while pouring
5. Distribute evenly for best results
6. Pour near return jets for better mixing
7. Do not add directly to skimmer

Step 6: Brush Pool Vigorously

Essential step for algae removal:

1. Brush entire pool surface thoroughly
2. Brush walls from top to bottom
3. Brush floor in overlapping strokes
4. Brush steps, corners, and crevices
5. Brush behind ladders and fittings
6. Continue brushing for 15 to 20 minutes
7. Dislodge as much algae as possible

Use the best pool brushes for effective algae removal.

Step 7: Run Pump Continuously

Ensure proper circulation during treatment:

• Run pump continuously for 24 to 48 hours
• Do not turn off pump during treatment
• Allows chemicals to circulate throughout pool
• Filters out dead algae
• Monitor filter pressure closely

Learn about how pool circulation supports proper maintenance.

Step 8: Clean Filter Frequently

Critical for removing dead algae:

• Clean or backwash filter when pressure rises 8 to 10 PSI
• May need to clean filter 3 to 5 times during treatment
• Backwash sand or DE filters thoroughly
• Clean cartridge filters with hose
• Continue until water runs clear

Step 9: Vacuum Pool

Remove dead algae from pool:

1. After 24 to 48 hours, vacuum pool thoroughly
2. Vacuum to waste if possible
3. If vacuuming to filter, clean filter immediately after
4. Remove all visible algae debris
5. Refill pool to proper level if vacuumed to waste

Post Treatment Maintenance

Immediate Follow Up (First Week)

Daily Tasks:

• Test chlorine levels (maintain 3 to 5 ppm)
• Test pH and adjust to 7.2 to 7.6
• Brush pool surfaces daily
• Run pump 24 hours daily
• Monitor water clarity
• Clean filter as pressure rises

After 48 Hours:

• Vacuum pool again if needed
• Test all water chemistry parameters
• Add algaecide for prevention
• Continue elevated chlorine (3 to 5 ppm)

Follow a comprehensive pool cleaning checklist for beginners.

Ongoing Prevention

Weekly Maintenance:

• Test water chemistry 2 to 3 times per week
• Maintain proper chlorine levels (1 to 3 ppm)
• Add weekly preventative algaecide
• Brush pool surfaces weekly
• Vacuum pool weekly
• Clean filter monthly

For ongoing algae prevention, see how to use preventative algaecides.

Pro Tips for Maximum Effectiveness

Expert Tips from Pool Professionals

• Shock first: Always shock pool before adding Green Treat
• Brush vigorously: Brushing is critical for algae removal
• Run pump continuously: 24 to 48 hours minimum
• Clean filter frequently: Expect to clean 3 to 5 times
• Vacuum to waste: Removes algae from pool completely
• Maintain high chlorine: Keep 3 to 5 ppm during treatment
• Be patient: Complete treatment takes 2 to 5 days
• Prevent recurrence: Use weekly algaecide after treatment
• Remove debris: Clean pool before treating for best results
• Practice eco-friendly methods: Learn eco-friendly pool cleaning practices

Avoid Common Mistakes

• Not shocking first: Green Treat works best with shock
• Insufficient brushing: Must brush vigorously and frequently
• Turning off pump: Needs continuous circulation
• Not cleaning filter: Clogged filter reduces effectiveness
• Swimming too soon: Wait until chlorine drops below 5 ppm
• Stopping treatment early: Complete full treatment process
• Not maintaining prevention: Algae returns without proper maintenance
• Ignoring water balance: Poor chemistry reduces effectiveness

Maximizing Green Treat Effectiveness

Water Chemistry: Maintain pH at lower end (7.2 to 7.4) during treatment for maximum chlorine effectiveness.

Brushing: Brush pool surfaces every 12 hours during treatment to dislodge algae and expose it to chemicals.

Filtration: Run pump continuously and clean filter frequently to remove dead algae.

Prevention: Use weekly algaecide and maintain proper chlorine to prevent algae return.

Troubleshooting Common Issues

Problem: Water Still Green After 48 Hours

Solutions:

• Shock pool again with double dose
• Add second treatment of Green Treat
• Brush pool vigorously
• Clean filter thoroughly
• Run pump continuously for another 24 hours
• Test and balance pH to 7.2 to 7.4
• Verify chlorine is at 3 to 5 ppm

Problem: Water Cloudy But Not Green

Solutions:

• Continue running pump 24 hours
• Clean filter multiple times
• Add clarifier to help filter capture particles
• Vacuum pool to remove debris
• Test and balance all water chemistry
• May take 3 to 5 days for complete clarity

See how to handle cloudy water in swimming pools and learn about how to use pool clarifiers.

Problem: Filter Clogs Repeatedly

Solutions:

• Clean filter more frequently (every 6 to 12 hours)
• Backwash thoroughly if sand or DE filter
• Use filter cleaner for deep cleaning
• Vacuum to waste instead of through filter
• This is normal during heavy algae treatment
• Consider replacing filter media if very old

Problem: Algae Returns After Treatment

Solutions:

• Verify chlorine is maintained at 1 to 3 ppm
• Add weekly preventative algaecide
• Test and balance pH to 7.2 to 7.6
• Brush pool weekly
• Clean filter monthly
• Check for phosphates and remove if high
• Consider adding solar ionizer for prevention

Frequently Asked Questions

How much Green Treat should I use?

Use 1 quart per 10,000 gallons for standard treatment. For a 20,000 gallon pool, use 2 quarts. For severe algae, you may need to double the dose or repeat treatment.

How long does it take Green Treat to work?

Green Treat typically clears green water within 24 to 48 hours when used with shock and proper brushing. Complete clarity may take 3 to 5 days depending on algae severity.

Do I need to shock my pool when using Green Treat?

Yes! Shocking is essential for Green Treat to work effectively. Shock pool first, then add Green Treat. The combination kills algae much faster than either product alone.

Can I swim after adding Green Treat?

Wait until chlorine levels drop below 5 ppm before swimming, typically 24 to 48 hours after shocking and treating. Test chlorine before swimming.

Will Green Treat work on mustard or black algae?

Green Treat is specifically designed for green algae. For mustard or black algae, use specialized treatments designed for those algae types.

Learn about treating mustard algae.

How often should I brush my pool during treatment?

Brush your pool at least twice daily (every 12 hours) during treatment. Vigorous brushing is essential for breaking up algae and allowing chemicals to work.

Can I use Green Treat in a saltwater pool?

Yes! Green Treat is compatible with all pool types including saltwater, chlorine, bromine, and mineral systems.

Learn about cleaning and maintaining saltwater pools.

Why is my filter pressure so high during treatment?

High filter pressure is normal during algae treatment as the filter captures dead algae. Clean or backwash your filter when pressure rises 8 to 10 PSI above normal.

Can I use Green Treat for prevention?

No. Green Treat is a treatment product for existing green algae, not a preventative. For prevention, use weekly maintenance algaecides.

Can I use Green Treat with a solar pool ionizer?

Yes! Green Treat kills existing algae while solar pool ionizers prevent future algae growth. Use Green Treat for treatment, then add a solar ionizer for ongoing prevention.

Explore pool ionizer pros and cons and the advantages of solar pool ionizers for residential pools.

Conclusion

United Chemical Green Treat provides fast, effective treatment for green algae in swimming pools. By following proper application procedures (shock first, add Green Treat, brush vigorously, run pump continuously, clean filter frequently), you can eliminate green algae and restore water clarity within 24 to 48 hours. Complete the full treatment process and maintain proper water chemistry to prevent algae from returning.

Key Takeaways

• Dosage: 1 quart per 10,000 gallons
• Shock pool first before adding Green Treat
• Brush pool vigorously every 12 hours
• Run pump continuously for 24 to 48 hours
• Clean filter frequently (3 to 5 times during treatment)
• Vacuum pool to waste after 24 to 48 hours
• Maintain chlorine at 3 to 5 ppm during treatment
• Complete treatment takes 2 to 5 days
• Use weekly algaecide after treatment for prevention
• Wait until chlorine drops below 5 ppm before swimming

For long term algae prevention that reduces the need for aggressive treatments like Green Treat, consider adding a Solar Pool Ionizer which uses solar power to release copper and silver ions continuously, reducing chlorine needs by up to 85% while providing season long algae and bacteria prevention that helps keep your pool clear and prevents the green algae blooms that require Green Treat treatment.