Thank you Loretta! I will look at the threads on here, but if you have found a bacteria product that seems better acting and appropriately priced, can you let me know?
The company I contacted was Aquaplankton but they recommended four microbial products instead of their name brand due to the size of our pond (1/4 acre, about 90 ft diameter, 4 ft average depth). You pond must be a pretty blue green after you apply the Aqua Shade. There is so much light here in AZ, it would be hard to block it for long.

Janis