I bought 10 head and tail light tetras last Sunday 22/5/11 as well as other fish for my new tank. On Saturday 28/5/11 four were found dead. Another fish died on Sunday 29/5/11 this fish had what look like white spots in it and a fungus growing about its head area.I have other fish in the tank that look ok.I am new to all this and I am worried why has this happened, has it been a bad batch or had I just been unlucky.Can Someone give me some advice because I do not want to lose any more fish.