i have a 30galon tank and i tryed to put some mollys in it i dont know what kid they are just that they are mollys and they keep on dieing could it be that my water is bad i use tap water form the sink i put neutralizers in the water so it doseent have any bad cemacals. I do have a tiger shark in the tank and it is pretty agrisve could it be killing my mollys.Please get back to me if u know the answer,