NH3/NH4 - аммиак и аммоний в аквариуме
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![Образование комплексного соединения сульфата тетраамминмеди (II) [Cu(NH3)4]SO4](https://sun9-32.userapi.com/xJbN7y5dTeBI0f79thoHS0AFhIDKKxy3ErK6sA/sz0Weci09uM.jpg)
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