I had it fairly heavily on the large pond last year. It never expanded beyond a depth of maybe 4 feet. No farther. It did eventually surround the entire perimeter of the pond.

Honestly I like the stuff. It is pleasing to the eye when it blooms, it does a phenomenal job absorbing nutrients (which almost guaranteed no algae bloom), it's a great place for small fish and invertebrates to grow and subsequently provide a food source for the larger fish, and an added benefit for me, it prevents shore fishing...that helps me be sure the neighbor kids aren't sneaking over.

For some odd reason I didn't get any this year...and correspondingly had a pretty rough year algae-wise.

Dale

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"When tempted to fight fire with fire, remember that the Fire Department usually uses water." - anonymous