Waterwizard.....thanks for that GREAT explanation. I have been reading on the floating island. I think my pond is full of nutrients as it was pretty empty for a number of years and is now full. During the empty years, alot of grass had grown on the pond bottom. Pondweed sprouted up and engulfed the pond. Algae has also started to become a problem. On top of that, I am pumping water into the pond almost 24\7. Algae seems to grow alot where the fresh water comes in. I don't aerate and don't really have the money to invest in it. My pond catches alot of wind and is only about 5 feet deep. I think I will give the bacteria a try to see what happens. Seems like the pros outweight the cons.
