Freakin' UV kight

I recently purchased a UV clarifier. My water has been green for about
a month or more now. Hyacintch not really taking off, we are now
getting into 80+ degree weather in GA. My pond gets full sun from about
11AM to about 6PM. Not good, I know. My pond at its fullest is ~1750
gallons. The UV I purchased is rated for 4400 gallons @1000 GPH MAX
flow. Ideal flow rate through the UV being 500-1000 GPH. Now, I have
the flow at around 850 GPH, best estimate. The UV has been running for
48 hours straight into a (temporary)filter made from a five gallon
bucket stuffed with quilt batting. The pond is showing NO signs
whatsoever of clearing. It looks tha same as when I first fired up the
UV. I have not had to rinse my quilt batting out so far. Last week it
rained just about every day, 7 days straight and was of course,
overcast the whole week. The green started showing signs of clearing on
its own after all the rain. I hooked up the UV and 48 hrs
later....nothing. Am I rushing things too much?