We got perfect conditions last week before leaving on vacation: Full pond, warm water, no wind, 1.5 units to be used. This time I tried applying to a side where theory has it there is a leaky interface between hard-pan subsoil and the excavated soil as it angles downhill.
Dumped quite a lot on that side with help from neighbors. Came back and it looks to have made an improvement! This may have been the culprit for the majority of the leaking. Only longer-term watching will give me any decent answers.

Today it is raining again, so I wont get a good read on leak rate, but having a full pond this time of year is rare so I am thrilled.

The skeeters are enjoying all this rain though :-(, making it rather difficult to spend any time there.