[Aquarium plants] Know the nutrients and how to choose and apply fertilizer

1.Nutritional components of aquarium liquid fertilizers
2.Nutritional components of aquarium solid fertilizers
3.Nutrient concentration in aquarium aquarium
4.How to measure nitrogen, phosphorus and potassium
●LAQUAtwin
・HORIBA LAQUAtwin pH
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・HORIBA Potassium LAQUAtwin K
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・HORIBA Nitrate Ion Meter LAQUAtwin NO3
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●packtest
・Phosphoric acid (low concentration)
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・nitric acid
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・Iron (low concentration)
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