Copper sulfate, a naturally occurring and manufactured copper salt, is used as a fungicide on crops, as a pesticide to kill snails and slugs, and as water treatment to kill aquatic vegetation. This chemical has serious chronic toxicity with implications for agricultural workers and the environment.
1 Keep the refrigerator temperature at or below 40Â° F (4Â° C). 2  The freezer temperature should be 0Â° F (-18Â° C). 3  Check temperatures periodically. 4  Appliance thermometers are the best way of knowing these temperatures and are generally inexpensive.
What is the ideal temp for a fridge and freezer? The ideal refrigerator temperature ranges between 35 and 38 degrees Fahrenheit, and the ideal temperature for a freezer is 0 degrees Fahrenheit. Use an appliance thermometer to determine the exact temperature of a freezer or refrigerator. Full Answer >.