I have a Pentair Triton sand filter. So my obvious leaks are the drain plug at the base and yesterday I notice water oozing from the top side of the tank in a couple of place, not much, but droplets form. Should I be concerned with catastrophic failure? The tank is approximately 25 years old, so it needs to be replaced. I have a 40,000 gallon pool, with todays technology changes and modern composites what type of filter tank should I be looking for?