Now, the use of plant nitrate and phosphate fertilizers, and if you do not provide enough water to plants than the Koi fish, "hard" algae and "free floating " algae use nitrate and phosphate to reproduce. The key is to prevent this situation, known as the "water bloom", is to provide sufficient nonsoil bearing plants, such as lettuce, water hyacinth competition of nitrate and phosphate.
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hydroponics
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