I'm no expert on this so take it for wht it cost ya. I pretty sure it will absorb some water before it all sealed up. I would keep running it off and on to keep it topped off for awhile. Maybe keep it filled for a few months then check it again.

The people who say I can't do it can just sit the @^#% down and watch me. Friends call me Rusto I also subscribe to pond boss mag. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=504716#Post504716