05-21-2010, 10:32 PM
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I wouldn't be surprised if it is being bullied. Tiger Barbs do best in groups of, I would suggest 6 or more. A 10 gallon tank is way too small for any tiger barbs, even 1 in my opinion. Any plans of getting a bigger tank in the future? I would suggest asking a fish store if they could take your tiger barb until you can get a significantly bigger tank to house a group of barbs, and to concentrate on your 10 gallon. The Tiger Barb may or may not last too long in the tank by itself. Make sure you keep on top of water changes, gravel vacuums and filter maintenance, as these also reflect the health of the fish. These are critical, ESPECIALLY in a tank as small as yours. Toxins build up quickly due to the less amount of water volume.
I think with quick cure, you are supposed to treat for 2 days, then do a 25% water change. But correct me if I am wrong, the directions on the bottle SHOULD say clear instructions. Also, I am wondering what filter you are running, and if you made sure you removed all your carbon from the filter - this will absorb some of the medication, making the dosage not sufficient.