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===Nutrients===
===Nutrients===
Phosphorous is the growth limiting nutrient in watersheds across Ontario.  
<p>Plants (including algae) require three macro nutrients to grow: Nitrogen, potassium, and phosphorous.  Of these three, phosphorous is the often the "growth-limiting" nutrient. i.e. the local environment may have an abundance of nitrogen and potassium, but algae won't develop unless phosphorous is available too. </p>
[[Phosphorous]]
[[Phosphorous]]
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===Metals===
===Metals===
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