I spread 7.5 lbs each on two different occurances. When getting rid of algae in a pond, it is always important to treat 1/2 of the pond algae at a time to avoid killing too much algae and depleting the water of oxygen. Then I add that mix with other water in several garden sprayer fulls.It don't matter how much you dilute the 7lb mix. Uniform spraying of a water solution of copper sulfate will guarantee that the copper sulfate spreads evenly across the pond. Apply every 2-4 weeks as needed. The first occurance was about 2 months ago, then again 2 weeks later. Copper sulfate kills algae and many fish parasites on contact. At any rate, the products are usually copper sulfate pentahydrate though you'll need to look at the concentration in the ingredients if it comes already diluted in water. I treated the algae with copper sulfate crystals. Keep adding water until all of the crystals have dissolved. Copper sulfate is much heavier than water, and if you just throw the crystals or powder into the pond, it will sink to the bottom where pond muds will chemically bind with it, … I now use copper sulfate all the time. Dosing for Liquid Copper Sulfate: Application for Liquid Copper Sulfate on a 1 acre pond: 1 gallon per acre with an average depth of 1-3 feet deep Mix 1/2 gallon of Crystal Plex with 2-3 gallons of water and spray ½ of your pond. The chart below gives mixing instruction for dissolving copper sulfate crystals in warm water to give 1 part per million copper in a specific size water tank. Wait 5 days and do the same application on the other ½ of pond. Determine how much copper sulfate you need. Combining 2 to 5 ounces of copper sulfate per every four gallons of water produces enough spray to control moss for a 1,000 square foot area of lawn. Hello, I have an 1/2 acre pond with an average depth around 6 feet. Ponds (Farm, Fire, Fish, Golf Course, Irrigation, Ornamental, Storm-water Retention, Swimming), Small Lakes, Fish Hatcheries, Aquaculture Facilities * See label for complete list Application : 0.6 - 1.2 gallons per acre foot of water treated Example: 100 ft. x 100 ft. Lakeshore Lot (.23 Acre) 4 ft. depth (Amount Required: .55 Gallons) Copper sulfate should be used as a pond algae treatment on actively growing algae in water temperature above 60F. These products can hold back moss growth without preventing grass from growing. It goes as deep as 10' deep though. The hatchery guy has me using no more than 7 pounds per acre a month. Some copper sulfate is sold in a jar to which you can add water. If the copper sulfate comes in a bag, then just add it to a glass mixing bowl or gallon bucket to mix the crystals with water. After weighing the amount of copper sulfate needed to treat the volume of your water, mix it in water, making sure that it all dissolves. It also will kill many weeds that infest a pond. Big L, I own a pond and used to fight algea all the time. Mix the copper sulfate with enough water for the blue crystals to dissolve. A table can indicate how much to use per acre-foot, depending on the total alkalinity of your pond. It is an inexpensive treatment and easy to apply. in water. If you don't keep fish in your pond, you can apply copper sulfate safely as long as the total alkalinity is above 20 parts per million. All necessary for Pest Control https://amzn.to/2rLU5CG ----- Copper Sulfate Pond Treatment. I mix 7lbs in hot water to help desolve it. About Copper sulfate; 1 cubic meter of Copper sulfate weighs 3 600 kilograms [kg] 1 cubic foot of Copper sulfate weighs 224.74066 pounds [lbs] Copper sulfate weighs 3.6 gram per cubic centimeter or 3 600 kilogram per cubic meter, i.e. Copper sulfate, along with ferrous sulfate and ammonium sulfate are safe for use on lawns. 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