Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Green Film on pond

I had a similar experience. The film had no odor or feel. I believe it happened when I was changing from one food to another. I thought the tilapia could use a larger pellet, I was wrong, so switched back. But, within a few days I noticed the film, about two days later a slight breeze pushed it all into one corner and the small tilapia appeared to eat it. Later the fish were large enough for the larger pellet food and again I noticed the film. This time, after 4 or 5 days, it appeared to develop into small clumps of green algae, 2" or 3" across. I skipped feeding for a day and the tilapia ate the algae, very impressive to see them doing their job. Coincidently, I finished the food and switched to another around the same time and have had no film since. Additionally, the food left an oily coating on my hand.