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Controlling Green Scum in Stock Tanks Green scum, or slime, that builds up in livestock drinking troughs and tanks is algae. It cannot grow without sunlight, but putting covers on tanks is not practical on New Mexico farms and ranches. Copper sulfate, often called bluestone, will kill the algae for a period of several months. It is cheap, costing less than $2 a pound at most drugstores. When used in the correct amounts, it is not harmful to fish or animals. In troughs or small tanks, a safe dosage is one level teaspoonful of copper sulfate per 1500 gallons of water. One ounce will treat 8000 gallons of water. A simple way to treat troughs and small tanks is to dissolve the proper amount of copper sulfate in a glass or enamelware container, and stir the solution slowly into the trough water. Where the algae buildup is excessive, pour the solution directly on the scum on the walls of the trough or tank to speed up the kill. In treating large stock tanks or ponds, drag a sack containing the correct amount of copper sulfate behind a boat, pacing yourself to cover the heavily infested areas first and working out to deeper water. Proper concentrations are one to three pounds per acre-foot of volume, but since most people tend to over-estimate the volume, one pound per acre-foot is a safer treatment. If your tank contains catfish (not scaled fish), treat one-half of the pond at a time, and allow the fish to move to untreated water. Scaled fish are less sensitive. The drawings and formulas show how to estimate the approximate number of cubic feet in troughs and tanks of different sizes. Measure in feet and decimals of feet rather than in feet and inches, to keep your calculations simple. You can figure the number of gallons in a tank by multiplying the number of cubic feet by 7.48, the number of gallons in one cubic foot. Other useful conversions are: 1 acre-foot = 43,560 cubic feet or 325,800 gallons 1 gallon = 231 cubic inches Formulas for Estimating Volumes in Small Tanks Volume in cubic feet (3.14) (D) (D) (g) When D = diameter in feet £ = length in feet V»-b--»/ Volume in = (a) (b) (8) cubic feet 2 When a = depth in feet b = width in feet £ = length in feet Volume in cubic feet (3.14) (D) (D) (£) 4 When D = diameter in feet C = depth in feet New Mexico State University is an equal opportunity employer. All programs are available to everyone regardless of r color, or national origin. New Mexico State University and the U.S. Department of Agriculture cooperating.
Object Description
Title | Controlling green scum in stock tanks |
Series Designation | Guide 400 B-111 |
Description | Guide containing brief information on using copper sulfate to kill algae in ponds and water troughs on New Mexico ranches. |
Subject | Algae--Control; Watering troughs--Sanitation; Copper sulfate; algae control (NAL); water troughs (NAL); algicides (NAL); copper sulfate (NAL) |
Creator | Hohn, Charles M. |
Date Original | 1976-04 |
Digital Publisher | New Mexico State University Library |
Rights | Copyright, NMSU Board of Regents. |
Collection | NMSU Cooperative Extension Service and Agricultural Experiment Station Publications |
Source | Scan produced from physical item held by the NMSU Library. |
Type | Text |
Format | image/tiff |
Language | eng |
Page Description
Title | Page 1 |
Series Designation | Guide 400 B-111 |
Subject | Algae--Control; Watering troughs--Sanitation; Copper sulfate; algae control (NAL); water troughs (NAL); algicides (NAL); copper sulfate (NAL) |
Creator | Hohn, Charles M. |
Date Original | 1976-04 |
Digital Publisher | New Mexico State University Library |
Rights | Copyright, NMSU Board of Regents. |
Collection | NMSU Cooperative Extension Service and Agricultural Experiment Station Publications |
Digital Identifier | UAAPg00B1110001 |
Is Part Of | Controlling green scum in stock tanks |
Type | Text |
Format | image/tiff |
Language | eng |
OCR | Controlling Green Scum in Stock Tanks Green scum, or slime, that builds up in livestock drinking troughs and tanks is algae. It cannot grow without sunlight, but putting covers on tanks is not practical on New Mexico farms and ranches. Copper sulfate, often called bluestone, will kill the algae for a period of several months. It is cheap, costing less than $2 a pound at most drugstores. When used in the correct amounts, it is not harmful to fish or animals. In troughs or small tanks, a safe dosage is one level teaspoonful of copper sulfate per 1500 gallons of water. One ounce will treat 8000 gallons of water. A simple way to treat troughs and small tanks is to dissolve the proper amount of copper sulfate in a glass or enamelware container, and stir the solution slowly into the trough water. Where the algae buildup is excessive, pour the solution directly on the scum on the walls of the trough or tank to speed up the kill. In treating large stock tanks or ponds, drag a sack containing the correct amount of copper sulfate behind a boat, pacing yourself to cover the heavily infested areas first and working out to deeper water. Proper concentrations are one to three pounds per acre-foot of volume, but since most people tend to over-estimate the volume, one pound per acre-foot is a safer treatment. If your tank contains catfish (not scaled fish), treat one-half of the pond at a time, and allow the fish to move to untreated water. Scaled fish are less sensitive. The drawings and formulas show how to estimate the approximate number of cubic feet in troughs and tanks of different sizes. Measure in feet and decimals of feet rather than in feet and inches, to keep your calculations simple. You can figure the number of gallons in a tank by multiplying the number of cubic feet by 7.48, the number of gallons in one cubic foot. Other useful conversions are: 1 acre-foot = 43,560 cubic feet or 325,800 gallons 1 gallon = 231 cubic inches Formulas for Estimating Volumes in Small Tanks Volume in cubic feet (3.14) (D) (D) (g) When D = diameter in feet £ = length in feet V»-b--»/ Volume in = (a) (b) (8) cubic feet 2 When a = depth in feet b = width in feet £ = length in feet Volume in cubic feet (3.14) (D) (D) (£) 4 When D = diameter in feet C = depth in feet New Mexico State University is an equal opportunity employer. All programs are available to everyone regardless of r color, or national origin. New Mexico State University and the U.S. Department of Agriculture cooperating. |