Daca da, atunci exista cateva posibilitati.
Lipsa de oxigen - Verificati cantitatea de oxigen din apa. Daca valoarea este prea mica (mai putin de 5 mg/l), schimbati apa intr-o masura destul de mare si verificati performanta filtrului. Ca masura pe termen scurt, este recomandat sa instalati pompa de apa.
Otravirea cu amoniac/nitriti - verificati de asemenea si nivelul de amoniu/amoniac si pe cel de nitriti din acvariu. Daca acesti parametrii sunt mari (NH₃/NH₄ > 0.25 mg/l; NO₂ > 0.2 mg/l), inseamna ca este vorba de o otravire cauzata de descompunerea de catre bacterii a pestilor morti. In acest caz, este recomandata o schimbarea generoasa a apei.
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