scsims :

I don't know if lime will work. On several posts over the last few days the use of drilling mud has been discussed . See -- Pellettized bentonite - and -- I think I will jump off the dam - or one of your prior posts on the subject. In one or more this matter has been addressed . I note that PO in one or two posts noted that he fixed his problem with a few bags at 10-12 dollars per bag - under $ 200 . After looking at the pics of your pond I think you could do the same unless you have a major rock fracture . Based on your water loss I don't think that is the case. I have also fixed ponds this way. I hope this helps. ewest