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Product Label SDS Sheet

Phycomycin is a Sodium Carbonate Peroxyhydrate based algaecide and is a wonderful tool in small ponds where oxygen depletion is a major concern. As the active ingredient in this product breaks down it puts more Oxygen into the water column, which helps to counteract the dying plants that are removing it. This product is designed to be used where copper is not an option such as Koi ponds and Trout farms.

Phycomycin is a granular product that attacks planktonic and filamentous algae on contact. You can actually see it working as you apply. Fast acting, it leaves behind no harmful residues and adds bio-available oxygen to the water.




50 LB Bag

Online Purchase Not Available.




Filamentous Algae Excellent
Planktonic Algae Excellent


Water Use Restrictions

Active Ingredients: Sodium Carbonate Peroxyhydrate*
Weight % Active Ingredient: 85
EPA Reg.No. 8959-10
Number of Days
Human Drinking 0
Human Swimming 0
Human Fish Consumption 0
Animal Drinking 0
Turf Irrigation 0
Forage Irrigation 0
Food Crop Irrigation 0

Phycomycin is effective both as an algaecide (eliminating existing blue-green algae infestations) and as an algaestat (i.e., retarding and preventing new growth). It works quickly, and neither it nor its byproducts (hydrogen peroxide and oxygen) linger in the ecosystem.


Phycomycin's active ingredient, sodium carbonate peroxyhydrate, creates a powerful oxidation reaction that destroys algal cell membranes and chlorophyll, providing immediate control of algae. Fast-acting (within 60 seconds of application), it leaves behind no harmful residues and adds 13% bio-available oxygen to the water. See chart below. Can also be applied as a spot or perimeter treatment.

*Consult Label for Exact Doses & Important Application Directions.

Phycomycin Application Rates
Seasonal Program
Rates for Specific Algae Problems
Step One Shock Treatment
Spring/Early Summer.
Apply 15-40 lbs./acre-foot** of water Spot Treatments* 20-50 lbs./acre-foot of water
Step Two Maintenance Treatments
Every 2-4 weeks.
Apply 8-25 lbs./acre-foot of water Planktonic Blue-Green Algae Blooms 9-30 lbs./acre-foot of water
Step Three Spot Treatment
As needed. Can be applied to perimeter only.
Apply 20-50 lbs./acre-foot of water Filamentous Algae Blooms 50-90 lbs./acre-foot of water

**Acre/feet are calculated as surface acres of pond X average depth. Example: 148 ft. x 148 ft. = 0.5 acres. Average depth 4 ft. Acre/feet = 0.5 acres X 4 ft. = 2 acre/ft.

Safe for Sensitive Fish Species

When used at the labeled rates, Phycomycin will not harm fish (including sensitive fish such as rainbow trout), plants or aquatic life. Phycomycin is labeled for use up to 90 lbs. per acre foot of water. EPA approved and NSF/ANSI Standard 60 certified for drinking water application.

For Best Results

Begin application in spring as water temperature warms to 60ยบ F and above. Early treatment when growth first appears or begins to create a nuisance will reduce the amount of Phycomycin you will need. Early treatment will also reduce the amount of dead growth.

Heavy, out of control growth may require more than one application or physical removal to gain control. For best results, use under conditions of minimal water flow. Apply early on the morning of a calm, sunny day.


*All pesticides can be harmful to health and the environment if misused. Read the label and follow directions. Consult with your local regulatory agency before applying herbicides and algaecides to public waters. There are herbicides from other states that are either not licensed in Wisconsin or Illinois, or are not recommended by ABI.

A WI DNR Aquatic Plant Control Permit or DATCP Fish Farm License is required in WI in order to apply algaecides or herbicides. In addition ponds and lakes with overflows not contained on the property are required to obtain a WPDES permit. Illinois Residents are required to obtian NPDES permits through the Illinois EPA.

In order to apply chemicals in liquid form within Wisconsin, the applicator must be licensed with the State.

Recommendations of pesticide or treatments for specific algae or aquatic plants are provided for general information purposes only - no warranties are expressed or implied.

* We do not ship EPA registered Algaecides or Herbicides to the following states:

Alaska - California - Connecticut - Delaware -  Hawaii - New Hampshire - New Jersey - New York - Maine - Maryland - Massachusetts  -Oregon - Rhode Island - Washington State - Vermont (for additional information about these restrictions please see shipping or terms and conditions).


Michigan Shipments

Aquathol K, Reward, Weedtrine D, & Sonar products can not be shipped without a permit on file.

This product ships via LTL Freight (Semi)