I purchased a house in July05 and after moving in a few months later discovered the pool has a leak. When I let the level go down, it went to just below the skimmer box. I paid for a "leak detector" to come and diagnose the problem, and he found a smallish leak coming from the return pipe just under the skimmer box.
The pool is fibreglass, 6m x 3m, 1m-1.5m deep. The concrete around the pool (where I need to get to the leak) is about 4" thick, and extends maybe 1 & 1/2 feet from edge of the pool. The only semi-helpful tool I have is a small angle-grinder to score the concrete, though given its depth I don't know if it is worth bothering.
I've been quoted $500-$1000 to fix the problem by the leak man, depending on the thickness of the concrete (the edge of concrete was hidden by overgrown garden at time of his inspection) - so more toward $1000 than $500...
Does anyone have any opinions/useful advice to a first time pool owner who's pulling his hair out?

Thanks
Travis
Brisbane, AU