Effective algaecide for ponds, water gardens, and water features containing live fish and plants
* Professional-strength granules, liquid, or tablet algaecide works on contact
* Powerful oxidation reaction provides effective control of all types of algae, including stubborn string algae, while raising oxygen level

Potent algaecide will treat, control, and prevent a broad spectrum of algae. Noticeable results can be seen in as little as 24-48 hours. Administer when growth first appears. Powerful oxidation reaction provides effective control of all types of algae, including stubborn string algae, while raising oxygen level. Use in water features including water gardens, fountains, and birdbaths or as a surface treatment.

GreenClean Powder (Granules) works on contact to immediately begin fighting algae blooms, and releasing vital oxygen into the water body as it biodegrades. Begins working within 60 seconds of application. 1 teaspoon to 16 tablespoons (1 cup) of GreenClean Granular per 1,000 gallons of water. 2-1/2 lbs of powder (granules) equals two cups.

For use in: ornamental ponds, watering troughs, water fountains, statues, walkways, and other water features.

Apply GreenClean to affected areas and watch it work as it makes contact with the algae, GreenClean releases oxygen into the water as it biodegrades.

Tips: Check pH levels before applying. pH level should be between 6.8 – 7.8. Apply early in the morning. Turn off circulation for 10- 20 minutes. Apply to affected areas. Skim dead algae from the water’s surface to help prevent further growth!

Your Pond Size

50 Gallons

100 Gallons

500 Gallons

1,000 Gallons

5,000 Gallons

10,000 Gallons


Curative Rate

1 Tablespoon

1.5 Tablespoons

0.5 Cup

1 Cup

5 Cups

10 Cups


Answers for Algae Control

Amount Shopping


8 LB.



2 LB.


GreenClean Granules
For use in water features containing live fish and plants. For indoor or outdoor residential use.

Directions for Use
It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. Avoid use near shallow water body margins during amphibian breeding season.

Contained Water Surfaces:
Water gardens, ornamental ponds, ornamental waterfalls, fountains, birdbaths, standing water.

Non-painted Surfaces:
Floors, walkways, storage areas, patios, decks, railing, roofs, asphalt shingles, siding, fiberglass, stairs, ramps, ground cover mats, weed control mats, concreter, brick, tile, slate, granite, statues/monuments, outdoor furniture, tennis courts (non-grass), shorelines, gravel, under benches, and other non-painted surfaces.

Water Treatment:
Use GreenClean Granular to treat, control, and prevent a broad spectrum of algae in listed sites. Effects of treatment are immediately apparent (bubbling, bleaching/discoloration of algae, floating of dead organic matter). Waters treated with GreenClean Granular are permissible to be used without interruption.

Surface Treatment:
Use GreenClean Granular on all listed non-painted surfaces to prevent and control algae, moss, slime molds and their spore, and the odors and conditions that these organisms cause.

Application Rates
Water Rate:
1 teaspoon - 16 tablespoons of GreenClean Granular per 1,000 gallons of water.

Non-Painted Surfaces:
1-3 pounds of GreenClean Granular per 1,000 square feet of area.

Measurement Conversions:
1 pound = 2 Cups
1 Cup = 16 Tablespoons
1 Tablespoon = 3 Teaspoons

String Algae in Water and on ornamental Waterfalls/Streams

Pond Size Curative Rate
50 gallons 1 Tablespoon
100 gallons 1-1/2 Tablespoons
500 gallons 1/2 Cup
1,000 gallons 1 Cup
5,000 gallons 5 Cups
10, 000 gallons 10 Cups

Tips for Treating String Algae:
STEP 1: Turn OFF circulation.
STEP 2: Apply GreenClean Granular to affected areas - including waterfalls and streams.
STEP 3: Turn circulation back on after 10-20 minutes.

Green Water Algae in Ponds

Pond Size High Curative Rate Low Curative Rate
50 gallons 1 Tablespoon 1/2 Tablespoon
100 gallons 1-1/2 Tablespoons 1 Tablespoon
500 gallons 1/2 Cup 1-1/2 Tablespoons
1,000 gallons 1 Cup 3 Tablespoons
5,000 gallons 5 Cups 1 Cup
10, 000 gallons 10 Cups 2 Cups

Tips for Treating Green Water Algae:
STEP 1: Shock with GreenClean Granular at the high curative rate.
STEP 2: Treat as needed once per week with GreenClean Granular at the low curative rate in conjunction with water conditioners.

Pond Cleaning and Non-Painted Surfaces

Heavy Growth Low Growth
4-6 Cups per 1,000 square feet 2-4 Cups per 1,000 square feet
Make granular applications over a wet surface.

Tips for Pond Cleaning:
STEP 1: Drain pond (remove fish and plants).
STEP 2: Apply GreenClean Granular to all surfaces.
STEP 3: Rinse with water after 10-20 minutes.
STEP 4: Drain Pond.
STEP 5: Re-fill pond (replace fish and plants after de-chlorinating as appropriate).

Active Ingredients:
Sodium Carbonate Peroxyhydrate* 50%

Other Ingredients: 50%
Total: 100%
*Contains 27.6% Hydrogen Dioxide by weight.

GreenClean Tablets
Application Instructions:
Apply tablets to pond according to recommended rates. When applying more than one tablet scoop, distribute evenly throughout pond.

Recommended Rates for
GreenClean Tablets:
Gallons # of Scoops
200 1
400 2
600 3
800 4
1,000 5
1,200 6

General Treatment Notes

  • Treat when algae growth first begins to appear.
  • GreenClean Granular is water activated.
  • Apply Early in the day under calm, sunny conditions, and when water conditions are warm.
  • GreenClean Granular will work more slowly in colder water.
  • Skim any dead algae and organic matter that rises to the water's surface after treatment.
  • If using in conjunction with other water conditioners (such as bacteria or enzymes), always apply GreenClean Granular first and wait several hours before adding other products.
  • Re-treat areas if re-growth begins to appear. Allow 48 hours between consecutive treatments.
  • After application, do not allow undiluted granules to remain in an area where humans or animals are exposed.
  • Non-target plants will suffer contact burn if undiluted granules are accidentally spilled on them.
  • Do NOT tank mix with aquatic herbicides or algaecides that contains copper or bromides. Always apply GreeClean Granular at least one day prior to the application of these products.
  • GreenClean Granular treatments are successful when contact of the pesticide is made with the algae.
  • When treating, it is possible that GreenClean Granular will not penetrates the infected area, and a second application is then required for treating any bottom growing algae.

GreenCleanFX Liquid
Highly effective and affordable solution to algae problems that plague a wide variety of backyard water features, including ornamental ponds, pondless waterfalls, and fountains. Removing excessive algae growth from pond or fountain will reduce the amount of decaying organic matter in the pond.

Apply GreenCleanFX Liquid to ponds and water features according to recommended rates.

Determining water volume:
Length (ft) x Width (ft) x Depth (ft) x 7.5 = gallons

fl oz/500
Low 1 1.7
High 2 3.4

Application Tips:

  1. Apply early in the morning under sunny, calm conditions.
  2. Measure the pH of water with Test Strips (#72655) before adding GreenCleanFX Liquid Algaecide. If pH is below 7.0, adjust the pH to between 7.0 and 8.0.
  3. Add one-two teaspoons per 50 gallons of pond/fountain water. Distribute recommended dose as evenly as possible to several areas around the pond/fountain so product evenly dispenses throughout the pond/fountain. GreenCleanFX Liquid Algaecide may also be mixed in a bucket of pond/fountain water and evenly distributed around the pond or fountain.
  4. Do not shut off pumps or aeration devices; aeration must be continuous during treatment for 48 hours.
  5. Repeat dose every 3 days until algae is under control. Once algae is controlled, apply dose once a week.

Active Ingredients:
Hydrogen Peroxide: 5.34%
Peroxyocetic Acid: 1.36%
Other Ingredients: 93.30%
Total: 100%