Originally Posted By: John Fitzgerald
Originally Posted By: Rainman
Oh...and, Bentonite is a colloidal clay...the smallest fines will often keep the pond perpetually muddy.


I put in Bentonite in combination with Soilfloc in 2016, and it all sank to the bottom fairly quickly, wasn't muddy for more than a few minutes. Last winter my pond had 10 foot visibility for a few days. The Soilfloc/Bentonite combo did not help with the leak long term. In fact, it seems slightly worse than it was in 2016.


Maybe there are other sources or types of Bentonite, or the water chemistry may play a part in the colloids, but I have been called to add Alum on over 20 ponds that used Bentonite