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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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Aquascape, removal of algae
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