Bill - I'm dealing with a very similar situation in the "swimming pool - fishing pond" that was previously discussed. SAMPLE PIC:
Algae Carpet After exhausting other conventional treatments, we starting applying GREENCLEAN PRO to the pond bottom by spreading the granulated powder from the bow of a slow-moving boat. The powder has enough density to rapidly sink to the bottom.
Within 15 minutes, large and small chunks of the now-brown algae mats began popping up to the surface - en masse (GC PRO tends to cause treated algae to become very buoyant). Sequence Pics:
#1 #2 I don't know if the algae was entirely "dead", but it certainly brought it up to the surface rather quickly. The owner's "maintenance crew" (all nine of 'em) were standing ready with pool nets and wheel barrows - removing the yuck as it came within reach. In a "typical pond", I suspect that the algae would have eventually become beached along the shoreline. I don't know if it would die as a result (if it wasn't already dead) or continue to multiply at that site.
In this particular case, the GREENCLEAN PRO did what we wanted it to do.
