Mi sembra molto strano che il colpevole sia il Manado, dovrebbe avere l'effetto opposto sui carbonati.
Preso dalla faq del sito JBL:
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Why does the TH (total hardness) go up after I have added JBL Manado?
Should the TH still remain too high despite several water changes, this is an indication that JBL Manado hasn’t been cleaned thoroughly enough. Please carry out a daily water change of at least 70% for about 4-5 days. The cleansing process should then be complete.
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