Sorry to hear that. It's hard to say what exactly it was that did them in, but I agree with the above...go through and check all of your parameters first and look for anything that might not be right. For them to die within 2 days of adding them to the tank, that tells me that something was seriously wrong...and usually that something is something simple that got overlooked and could probably easily be corrected. I would also recommend that you try cheaper fish next time instead of high dollar designer clowns. You want something cheap and hardy to make sure the tank is safe before investing the money into the expensive stuff.