Just curious have you ever swapped tanks? Or is it the same tank for 46 years? Silicone doesnt generally last longer than 25
The tank started in here in 1971. In about 1979 or 80 I moved 9 miles and took the tank with me. In my new house I transferred everything to it's present 100 gallon tank which it has been in since 1980.
So for 37 years it has been in the 100 gallon tank.