My family and I just bought a 1970's house with a fiberglass inground pool that is probably the same age. I haven't even started to dig into what state the pool equipment is in. The previous owners only noted that the pool had a new gas heater that needed to be hooked up. I'm guessing it needs more than the heater exhaust pipe hooked up but am glad I found this forum. I've never owned a pool before or really expected to. I am a scientist with an industrial wastewater treatment technology company so I have a solid understanding of water filtration.
It appears to have been a fully enclosed pool with an electric furnace and heat pumps to heat the pool. It's now only partially enclosed and my first project is securing it for safety.