I have used a blend of I believe 15-46-0, or real close to that, that I found at a local fertilize plant, and last year, dissolved it in water and applied w/ a paddle boat. It worked well. It took some effort to dissolve, but saved lots of $$$ . A hundred pounds of the stuff cost me like 6 bucks. They called it DAP, and told me it is designed for use in landfills to promote bacterial growth to decay garbage faster. The mixture however is ideal for pond fertilization, and very cheap. Try buying 100 lbs. of pond fertilizer from your local hatchery for 6 bucks. I applied 6 lbs. 2 weeks apart to my 3/4 acre pond. Good luck! Once again, for me, once I found the estimated amt. needed for my size pond, the best advice I got was from Bob lusk, when he said to try to achieve an almost olive green color. I added a little, waited, added a little and it worked. The year before, I threw the granules from the bank w/out dissolving, and ended up w/ a moss covered pond. Be sure to dissolve if you try the cheap method.
