Yeah...1969 was before Al Gore invented the internet. Check this thread
http://www.poolforum.com/pf2/showthr...ighlight=ajs-1
Findng a small leak with dye will take a lot of patience but is possible. I chased a leak last Spring (2005) and took a bit of effort but paid off.
Hope this helps and any more questions don't hesitate to ask.
Al