I am having the same problem. Seller sent me guppies and they had columnaris, but I did not realize before it was too late. I ordered medications online and had them sent overnight, but by the next morning 98% of fish were dead. Mind you, I had ordered over 250 fish. The rest of the fish died next hour or two. My neighbor confirmed it was columnaris as they are a veterinarian. I threw the fish out after taking pictures of many dead fish as they kept on dying by the minute it seemed like. Now PayPal wants me to ship back the fish?!?!!?? That was over 30 days ago!! I guess I should hold onto dead fish and return them next time rotting if I could even stand the smell that long. How stupid!! I am calling and waiting on hold tomorrow even if it takes all day to get a human on the phone.
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