LYCOS RETRIEVER 
Algae
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Algae (one Alga, several Algae) is a family of (usually) simple organisms. All of them photosynthesise. They capture light, and change it into energy. Normally, people think that algae are simple plants. Other kinds of algae ... seem to be more like simple animals. That is why, Algae form a group of their own.
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Algae is an indicator that there are too many nutrients in the pond. For example, the algae consumes the nitrates formed by ammonia and grows until the ammonia is used up. If you kill the algae with chemicals the ammonia level will climb until it kills your fish.
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Algae is not harmful to swimmers. It just causes the appearance and integrity of your pool to suffer and occupies time to correct. If you do get algae, you are not alone; it has been seen in pools of some of the foremost authorities on pool care and maintenance. Rest assured, any algae can be killed, but not without a few days of continued effort and time. Therefore, it is best to begin with a discussion on the necessary steps to prevent algae growth. An ounce of prevention is worth a hundred pounds of cure.
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An Algae Bar costs $24.95. You will spend that much and more fighting green algae with chemicals. An Algae Bar will save you money you would otherwise have spent on chemicals, you will spend less time cleaning your swimming pool, and more time enjoying it. Isn't that why you bought your pool in the first place. This summer when you're making your third or fourth trip to buy some chlorine to use against green algae, think about the Algae Bar. When you're scrubbing your pool again and again, think about the Algae Bar. When you're so fed up with maintaining your pool, instead of being in it, think about the Algae Bar.
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Algae will always be present in aquariums and their control is simply a matter of minimizing excessive nutrients and maintaining a diverse population of herbivores. Eventually a state of equilibrium will be reached which is unique to each tank where algae growth will be matched by algae consumption. By carefully inspecting new specimens and maintaining a variety of herbivores that include the Pacific Turbo Snail then, if Asparagopsis is encountered it will be just one more interesting life form to be observed and identified in the amazing microhabitats we keep.
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Algae control can be accomplished by reducing plant nutrients (fertilizers). These include phosphorus and nitrogen, minor nutrients such as sulfur and various micronutrients such as iron, manganese, magnesium, zinc, molybdenum, cobalt, etc. This is why algae removal using algaecides often results in weed growth and weed control with herbicides often results in heavy algal blooms.
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Algae