I'd just treat them with that ick medicine. Salt would work too, but im not sure how much to add, or if it can be used with other medicines. Oh, and try to get the sick platies to a different tank, because it isn't good for your fish to be exposed to ich or the medicine. Good luck
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2 siccortail rasboras, 3 black phantom tetras, 3 serpae tetras, 4 julii corys, 2 panda corys, 8 amano shrimp, 1 pleco, and plants in a 20 gal |