I agree with all the above posts.
Unfortunately if you purchased them from one of the bigger pet/co/smart stores the simple fact that they buy thousands of them at a time for pennies and have no real care to take the proper steps to assure a healthy fish to the consumer there is nothing you can do to help the situation.
Really, the best advice I can give someone buying from the above mentioned retailers is just to try to buy them when they are on sale and buy 2-3 x's as many as you really want because its likely if you do that you MAY end up with the actual amount you want that are healthy after two weeks.
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