Just bought a used 210 gallon from a guy who thinks the tank is about 10 years old.. the silicone looks in good shape with no chipping or flaking. Tank was full (saltwater) when i saw it then he emptied it an i took it home.. i will be using it for freshwater if that matters.... im just worried that it might leak one day in the near future but looks in good shape an dont wanna do extra not needed work?