Given the size of your pond, if you can wade out into the water, a 34" garden type hose can get the job done. the spray does not always have to be really fine. The spray from a hose can create enough turbulence to mix reasonably well. Treat roughly 1/4 of the pond at a time, or at least in sections, with both H lime and Alum. this will give the fish "safe zones" to escape the rapidly changing pH levels. I'd guess you will need a minimum of 1200 pounds of Alum/600 pounds Hydrated Lime to clear the water completely.
I got my trash pumps from Harbor Freight on sale, and spent the $$$ for the no questions asked, 2 year replacement coverage. I definitely prefer using my spray barge with boomless spray nozzels drilled out, but if you look at Lassig's thread near the bottom of the last page, you will see the topless 275G tote I use with bulkheads for mixing and pumping.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=417928EDIT...I have no clue where any blanket application rate was mentioned on the site.
