I bought half a dozen Mickey Mouse platties from my LFS and put them in a cycled Spec III for quarantine. Although the water parameters are good with Ammonia 0 and Nitrates at about 10, one, by one they have all died. They were active, eating well and then they were belly-up, one by one over the last 10 days. They were in another slightly smaller cycled tank for a couple of weeks until I could move them over to the "better" tank. I wonder if I should have left them in the 2g circular tank I bought awhile back in an emergency? I don't know if its a problem with the fish or the tank. But the betta who was originally in it is perfectly healthy. I'm not sure if I could contact the LFS or just write the fish off. I have 2 new ones from Petsmart in the circular tank and think I will leave them there just in case it's something with the Spec lll.