I just started feeding my monsters tilapia, smelt, and shrimp. But im having trouble preparing the food. I thaw the food completely then gut the smelt and wash them off. But im worried that they are sucking up the tap water along with chlorine. So i let it completely dry off and then rinse it with water from my tank. But is all this necessary? How have you guys been preparing your foods? What i am concerned about is specifically the chlorine.