9:1 tank mix. 9 oz water to 1 oz product. Nine gallons of water to one gallon of product.
Here's the label.
Cutrine Plus Liquid label You have filamentous algae, if it's not a solid mat of algae, I would go with 0.6 ppm dosage. If it's a solid mat go to the next higher dosage
To measure the pond, if it's a few years old, go here:
http://acme.com/planimeter/ Measure the perimeter of the pond. You could also do it in google earth. If the pond has 400' of shoreline, and the algae is 5' wide around the edge, then you have 2,000 sq. ft. of algae to treat. That's .0459 of an acre.
If the water in that area goes from 0 to 4' deep, give it an average of 2' deep. That's .0918 of an acre foot of water.
Check my math, but I'm thinking 21 to 22 fl. oz. of Cutrine Plus Liquid, along with 9x that amount of water mixed in a sprayer and sprayed around the perimeter of the pond is what to use in that fictitious example that I just used.
I wouldn't spray more than 7,500 sq. ft. at one time if your pond is 1/2 acre.
Remember you have to figure out the amount of product to use to achieve the PPM dosage that you need. You could add 100 gallons of water to the spray tank and if you spray it over the same sq. ft. area, the PPM dosage won't change.
