I finally have my 12x24 Intex Ultraframe XTR 12x24 up that I bought used, and it's so great. The only problem is that the sand base underneath the pool is wet in places, and that patch seems to be spreading (think the movie blood that is moving outwards from underneath the body of a character that was shot). So I figure I have a leak, or several. Is there a trick to find it? Is the only way to try really to find it by eye and then use the ink to see if it is getting sucked into the potential hole?