Кислотность pH воды в аквариуме. Норма, влияние, контроль
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![Вадим Зеланд 💧 Живая вода [полная версия]](https://sun9-22.userapi.com/eDzBfVDWdePE6KU7sIP5Kso2dUkiVnZp_eFQzQ/G5oRzFcQ2Og.jpg)
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