ph value is an important factor in water quality and has a decisive impact on creatures. Different creatures need different ph value. An unsuitable ph value may cause fish’s illness or death. pH：4.5～9.0 （4.5，5.0，5.5，6.0，6.5，7.0，7.5，8.0，8.5，9.0）
ph value is an important factor in water quality and has a decisive impact on creatures. Different creatures need different ph value. An unsuitable ph value may cause fish’s illness or death.
pH：4.5～9.0 （4.5，5.0，5.5，6.0，6.5，7.0，7.5，8.0，8.5，9.0）
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