This could be part of the problem. You have no idea what his temps are. Are the thermometer and hydrometer you bought digital, analog or stick on? If its an analog or stick on unit return it and get your money back. If its too cold or too hot they wont eat.
Go to lowes or home depot and grab an Accurite with a probe ( http://images.google.com/imgres?imgu...LtStlAfOnrH2Dw )