When water is stagnant, has a high temperature or a high concentration of Nitrates and Phosphates, an algae bloom might occur, which can cause several problems. Blue-green algae growth, also known as cyanobacteria, can cause a foul odour to the water, a layer of scum on the surface and even pose a health risk. Green algae may colour the water green, look unclear and plants can die. Therefore an algae problem is often unwanted and algae control is desired.
1 An alcoholic beverage made by distillation rather than by fermentation. 2  A rich broth resulting from the prolonged cooking of meat or vegetables, especially greens. 3  Also called pot liquor. 4  An aqueous solution of a nonvolatile substance. 5  A solution, emulsion, or suspension for industrial use.
Alcohol, or ethyl alcohol (ethanol), refers to the intoxicating ingredient found in wine, beer and hard liquor. Alcohol arises naturally from carbohydrates when certain micro-organisms metabolize them in the absence of oxygen, called fermentation. Beer, wine and other liquor contain different amounts of alcohol. The amount of alcohol in distilled liquor is known as ?proof?. Proof refers to the amount of alcohol in the liquor; for example, 100 proof liquor contains 50% alcohol, 40 proof liquor contains 20% alcohol, and so on.