[mojomatti]

Lazypup was accurate with his measurements, it is in fact a 48 x 48 tub.
After I discovered the initial leak with the tub running, I topped up the water
and left it off to see if it still leaks, and it does.
I've let it sit now for a few days and it has lost a good 5 inches of water.
Last year at this same time I noticed a leak and all it took was a turn of one of the interior ports and that took care of the problem...
I turned a few of the ports again and will now give it a few days to see if that does anything. Hopefully I'll get lucky again!!!!
How and where would I find the tub stopper/drain valve that Lazypup mentioned? My tub does not have anything like that on the interior floor.
If I dropped some food colour in the tub, would it be drawn to the leak area? The tub sits on concrete and it would very hard to distinguish colour on it.
Like I mentioned before, I am going to give it a few more days and see if it still leaks.
The water level is still just above the highest port at this time, so like mrcaptainbob had mentioned it may stabilize at that time and I can start an elimination process.
Thanks again