So some of you may remember my thread a month or so ago. I was building my 2500 gal pond with a 50 ft long creek/stream from my small 300 gal pond. Well some of you may also remember me finding a leak and patching it. I just found another leak lastweek and just now got done moving all my plants,fish,rock,frogs to my small pond and what not. And pulling the liner up and redoing the entire pond. Moved a few ton of rock. So I was an idiot and didn't put down underlayment the first time. But now I got sand on the bottom, with a underlayment pad on top of that (not sure of the name, the fish pond store sells it here) and 2(yes 2) 45 mil pond liners on top of that. I am ready this time. I AM TIRED OF LEAKS!!!!!!!! but all my fish are still in the 300 gal and alive, will be moving to the big pond again soon. My dad is dreading the electric bill. We run off of a well so it was pumping for hours lol.