In what manner are they behaving strangely? I know I killed all my sulawesi snails cause I dosed anti planaria, did not research properly thinking they will be snail safe since the one I use is shrimp safe. They had some sort of foaming/white substance around their mouth. I see them move(looks sort of a struggle) their bodies but they don't move from their spot and just starts to slowly give in and die eventually.
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