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Line 68:
Line 68:
→Design
|Filter bed < 0.5 m||Filter bed > 0.75 m
|Filter bed < 0.5 m||Filter bed > 0.75 m
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|Filter media Phosphorus > 30 ppm||Filter media Phosphorus < 30 ppm
|Filter media Phosphorus > 40 ppm||Filter media Phosphorus < 40 ppm
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|Filter media predominantly sand||Filter media contains fractions of fines and organic material in sand
|Filter media predominantly sand||Filter media contains fractions of fines and organic material in sand