new houseboat to me , first time houseboat owner - early 2000s sunstar, raritan MSD type 1 , trying to find the right chlorine type chemical that is needed for the system, I cant seem to find anything on line or I may be looking for incorrect items, when I look for chlorine tablets it takes me to pool equipment which I understand is the Incorrect product and can be dangerous , just trying to find a place to purchase the correct product.