I have a house that was built new in '88. I've never had the septic tank
pumped, never put any of these treatments in it. Never had any problems
with it to date. For the most part, after the ex vamoosed around '90, I've
been the sole user.

Is pumping the tank periodically necessary? Is there any benefit to using
any type of septic tank treatment? I was under the impression that the
bacteria that's in there is supposed to be self sustaining.

Thanks for all shared wisdom