The water tank on my 2003 22ft Seafarer contains a slim which clogs the pump filter. I put Aquafresh tablets in durring the summer and have even tried to add some bleach but the slime still is present. I can run the pump for about a minute until the water flow is stopped and I need to remove and clean the filter. Does anyone know if I can remove the filter on the pump and pump the tank dry? Will running the slime through the pump damage it? How do I prevent the slime from coming back and how do I eliminate it? Is there any other way to empty the tank?