One of my harlequin rasboras has fungus on its tail. It's the third rasbora to get this condition. The first one was three months ago, when we first got the fish, and we noticed it on one fish immediately after we got home from the fish shop, and took that fish straight back, writing it off as a dodgy fish or a netting injury. The second one was three weeks ago. We removed the fish to a quarantine tank and treated it with anti-fungus medication containing malachite green. The fungus cleared up after a few days, but the fish died shortly after reintroduction to the main tank. Now another rasbora has it, but no other species in the tank has ever shown any signs of any pathology. We do 50-60% water changes every week, and water parameters all copacetic (Ammonia, 0; nitrites, 0, nitrates, 0; PH 6.6)
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Could it be a weak stock of rasboras?
Any treatment recommendations, and should we treat the whole tank this time or quarantine the fish?
Could it be a weak stock of rasboras?
Any treatment recommendations, and should we treat the whole tank this time or quarantine the fish?