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| http://fishandboat.com/images/fisheries/afm/2004/4_07-19sgl_trout.htm |
Nitrates measures the amount of nitrogen (in it's several different forms) in a water body. For some plants and algae nitrogen is essential to help them grow or reproduce. With too little, plants wont grow and so there's not enough dissolved oxygen in the waterbed. With too much, plants can over grow and not allow enough sun through the water.
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| http://www.advancedaquarist.com/2007/4/review |
pH tells the water's acid content. The pH scale ranges from 0.0 to 14.0 and shows how acidic or basic water is. 7.0 is neutral, anything greater than that is basic and anything less is acidic. If a waterbed is too basic or acidic the fish in that water will die. pH controls most processes that take place in the water, whether chemical or biological because every organism has a different level of pH it can tolerate.
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| http://ga.water.usgs.gov/edu/ph.html |
Conductivity is testing if water can conduct an electrical current. Pure water will not conduct unlike water full of particles.
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| http://www.trakindo.co.id/website/pages/product-support/sos/laboratory-facilities.php |
Turbidity is the measurement of how clear water is. This is important because the amount of turbidity directly effects how far and how much sunlight reaches in the water. Sunlight fuels plants photosynthesis and how ever far sunlight reaches determines how far plants can grow. These plants provide oxygen through the water. The more sunlight the more plants, the less sunlight the less plants. There are two ways to measure turbidity, a Secchi disk (for deep still waters) or a transparency tube (shallow and flowing waters).
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| http://www.herald-dispatch.com/news/x87591212/HHS-students-teach-science-to-fourth-graders?i=0 |
Dissolved oxygen is super important because fish need to breathe much like humans and other animals, and they need oxygen to do so. The amount of dissolved oxygen in water determines what can live there as different plants and animals require different amounts of oxygen to survive. Solubility is the measurement of dissolved oxygen and is affected by temperature (cold water dissolves more oxygen), atmospheric pressure (less pressure, less oxygen), salinity and what lives there. Plants add oxygen through photosynthesis into water.
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| http://www.herald-dispatch.com/news/x87591212/HHS-students-teach-science-to-fourth-graders?i=0 |
Temperature is easy to measure but super important. It affects everything, what lives there, dissolved oxygen, pH, conductivity, etc. Plus it gives a good insight to weather patterns, local and global.
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| http://www.pondpets.com/pondtemp.htm |
Alkalinity is a water bodies ability to neutralize acids. This is important because aquatic life is sensitive to acid. The better the alkalinity the better the water quality is.
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| http://www.advancedaquarist.com/2007/8/review |






















