One note, you can use a normal garden hose to clean and fill your tank--even if its not drinking water safe. However, you should not, for example, use a garden hose to run water continuously to and from your tank. Since the water is only in the hose for a brief amount of time, the chances of the algacide getting into your tank is slim. However, if you ran the water through the hose all day, alot of the algacide would get into the tank. Nonetheless, you should buy a whole house water filter and connect it to the end of the hose when it returns into the tank (usually about 14 dollars and 25 for the good filter).