Well, this is just one side of coin. let see if algae grow and die and multiply and again die, no matter how much digestion of Nitrates and phosphorus takes place, so there is again sediment, what we've called Waste!

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Well, this is just one side of coin. let see if algae grow and die and multiply and again die, no matter how much digestion of Nitrates and phosphorus takes place, so there is again sediment, what we've called Waste!