After re-doing my pond......... Re-coring the dam, removing all large rocks from the bottom and compacting it with a sheepsfoot, it looked like somehow I still had a small leak right behind the dam.
I would say it was running like 1/2 a kitchen faucet
Sort of knowing where it was coming from I bought two pails of db-200
I applied it with a small seed spreader for the most part and where I had my strongest suspicions I went a little heaver
Sure enough when I checked it the next weekend I saw no visible leaks behind the dam
That was only I pail I still have one more