At $350 per pail you have a very generous neighbor!! IT sounds like it worked well for you. From all that they are willing to make public on their webpage, it seems to be a polymer product. It isn't clear if it is a single part or 2 part, or maybe a 2 part premixed in the pail already?

I would be very interested to hear from Forum member T.J. how this might compare to the product called Soilfloc that he recommended for our pond. Both sound similar but probably have real life differences (in cost?) and success or life-span that causes him to recommend one over the other.

Glad to hear you are doing great with overnight losses.