
dttk
Senior Member
Apr 20, 2001, 11:18 AM
Post #8 of 9
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Dear Paul, referring to your question abt a white ?slimy coating on the head of the koi after adding new tap water, did you also add Sodium Thiosulphate crystals to remove chlorine? As far as I know, based on a similar experience I had years ago, excessive Sod. Thiosulphate causes a whitish layer on the head, eyes and body of koi causing it to be less active, which disappears when water is changed. If this is not the case, then perhaps other members of the forum could advise. Thank you.
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