Salam,
Saya baca artikel ttg syarat media air utk ikan di salah satu blog.
Berhubung bukan ahli perikanan saya justru bingung dengan istilah : PH
& Kesadahan (misalnya kesadahan lunak).
Kalau PH sih dikit2 tau maksudnya, tapi kesadahan apa ya..??? Mohon
pencerahan dr para senior.
Terimakasih...& salam metal...
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