Best Green Clean Granular Algaecides In April 2025

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Here you have our curated list of Best Green Clean Granular Algaecides. Each of them comes with different price, style, and design, so you have plenty of options to choose from. Keep reading for our top products review!

To help you in your search, we have completed this list of the Best Green Clean Granular Algaecides.

Top Rated Best Green Clean Granular Algaecides Of 2025

Rank Product Name Score
1
Crystal Blue Copper Sulfate Algaecide - Aquatic Grade Granular Pond Algae Control
Crystal Blue Copper Sulfate Algaecide - Aquatic Grade Granular Pond Algae Control
9.7
2
HTH 52023 Super Shock Treatment Swimming Pool Chlorine Cleaner, 1 lb
HTH 52023 Super Shock Treatment Swimming Pool Chlorine Cleaner, 1 lb
9.5
3
In The Swim Super Pool Algaecide - 1 Quart
In The Swim Super Pool Algaecide - 1 Quart
9.1
4
CrystalClear Algae D-Solv - EPA Registered Algaecide - 16 Ounces Treats 5,760 Gallons
CrystalClear Algae D-Solv - EPA Registered Algaecide - 16 Ounces Treats 5,760 Gallons
8.8
5
Pool Essentials Shock Treatment 6 Pack (13.4 oz Bags)
Pool Essentials Shock Treatment 6 Pack (13.4 oz Bags)
8.6
6
CLOROX Pool&Spa 33506CLX Pool Shock XtraBlue (6 1-lb Bags)
CLOROX Pool&Spa 33506CLX Pool Shock XtraBlue (6 1-lb Bags)
8.3
7
API POND ALGAEFIX Algae Control 32-Ounce Bottle, FISHAQUARI (169G)
API POND ALGAEFIX Algae Control 32-Ounce Bottle, FISHAQUARI (169G)
8.1
8
GreenClean Granular Algaecide - 8 lbs - String Algae Control for Koi Pond
GreenClean Granular Algaecide - 8 lbs - String Algae Control for Koi Pond
7.8
9
Clorox Pool&Spa Shock Plus 6 Pack (1 lb Bags)
Clorox Pool&Spa Shock Plus 6 Pack (1 lb Bags)
7.5
10
BioSafe Systems Greenclean Granular Algaecide 20 Lb
BioSafe Systems Greenclean Granular Algaecide 20 Lb
7.2

1. Crystal Blue Copper Sulfate Algaecide - Aquatic Grade Granular Pond Algae Control

1
9.7/10 our score

  • 99% copper sulfate pentahydrate
  • Granular copper sulfate, 5 lbs
  • Controls most species of algae like filamentous, string algae and swimmers itch
  • Do not use with koi or goldfish
  • Most effective when cast out on top of thick floating algae mats

2. HTH 52023 Super Shock Treatment Swimming Pool Chlorine Cleaner, 1 lb

2
9.5/10 our score

  • Use: apply directly to pool water as needed, test pool water and shock weekly to keep free available chlorine levels between 1 and 4ppm
  • Benefits: increases the chlorine level in swimming pools to kill bacteria and algae to keep your pool water clear and ready for fun all season long
  • Features: increases chlorine levels, kills and prevents bacteria and algae, keeps water clear, see results in 24 hours, 1 bag treats 13,500 gallons, wont fade vinyl pool liners
  • Includes: six 1-lb bags of shock treatment for your swimming pool
  • Compatibility: effective for all swimming pool types including pools with liners and gunite pools, and saltwater pool systems

3. In The Swim Super Pool Algaecide - 1 Quart

3
9.1/10 our score

  • Non-foaming formula, with no odor
  • Note: we are currently unable to ship super algaecide to the state of california.. we apologize for the inconvenience.
  • Contains 7.1% chelated copper (chelated to protect from staining)
  • Provides superior algae-fighting power with long lasting effects
  • Safe enough to swim directly after use

4. CrystalClear Algae D-Solv - EPA Registered Algaecide - 16 Ounces Treats 5,760 Gallons

4
8.8/10 our score

  • No more green water
  • Fast-acting epa registed 5.4% algaecide
  • Stops algae growth, works on string algae
  • Great for water garden ponds, waterfalls & fountains
  • 16 oz bottle treats up to 5,760 gallons

5. Pool Essentials Shock Treatment 6 Pack (13.4 oz Bags)

5
8.6/10 our score

  • Fast-dissolving pool shock
  • Clears cloudy water and removes swimmer contaminants* (*) such as body oils, sweat, lotions and urine
  • No assembly required
  • Power_source_type: manual

6. CLOROX Pool&Spa 33506CLX Pool Shock XtraBlue (6 1-lb Bags)

6
8.3/10 our score

  • Power source type: manual

7. API POND ALGAEFIX Algae Control 32-Ounce Bottle, FISHAQUARI (169G)

7
8.1/10 our score

  • Will not harm fish and plants when used as directed.
  • Dose every three days until algae is controlled and then treat weekly
  • Contains one api pond algaefix algae control 32-ounce bottle
  • Controls green water to keep pond water clean and clear in ornamental ponds and water gardens
  • Effectively controls green water algae, string and hair algae, blanketweed algae

8. GreenClean Granular Algaecide - 8 lbs - String Algae Control for Koi Pond

8
7.8/10 our score

  • Treats up to 16,000 gallons
  • Alternative to harsh chemicals chlorine, copper and phosphate-free
  • Non-harmful to fish and aquatic plants when used as directed
  • Immediately begins fighting algae blooms, releasing vital oxygen into the water body as it biodegrades
  • Begins working on contact, killing algae fast, results in 24 to 48 hours

9. Clorox Pool&Spa Shock Plus 6 Pack (1 lb Bags)

9
7.5/10 our score

  • Kills bacteria and algae
  • Won't impact ph
  • Improves filter performance
  • Creates crystal clear water
  • Fast-dissolving, pool shock
  • Note: packaging may vary

10. BioSafe Systems Greenclean Granular Algaecide 20 Lb

10
7.2/10 our score

  • Green clean granular algaecide 20lb

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