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→Nutrients
==Nutrients==
==Nutrients==
Plants (including algae) require three macro nutrients to grow: Nitrogen, potassium, and phosphorus. Of these three, phosphorus 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 phosphorus is available too.
Plants (including algae) require three macro nutrients to grow: Nitrogen, potassium, and phosphorus. Of these three, phosphorus 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 phosphorus is available too.
See [[Phosphorus]] page for more on phosphorus. See [[Additives]] page for guidance on filter media additives to enhance retention of phosphorus and other types of pollutants.
See [[Phosphorus]] page for more on phosphorus. See [[Additives]] page for guidance on filter media additives to enhance retention of phosphorus and other types of pollutants in [[Bioretention]], [[Bioswale]], [[Stormwater Planter]] and [[Stormwater Tree Trench]] facilities.
[[File:TP effluent comparison.PNG|thumb|600px|Under the Provincial Water Quality Objectives set out by the Ministry of Environment and Energy in 1994, Total phosphorus effluent leaving a SWM facility should be below a concentration level of 30 μg/L. (0.03 mg/L) (MOEE, 1994)<ref>Ministry of the Environment and Energy. 1994. WATER
[[File:TP effluent comparison.PNG|thumb|600px|Under the Provincial Water Quality Objectives set out by the Ministry of Environment and Energy in 1994, Total phosphorus effluent leaving a SWM facility should be below a concentration level of 30 μg/L. (0.03 mg/L) (MOEE, 1994)<ref>Ministry of the Environment and Energy. 1994. WATER