Bryan,
I have a 1.2 ac pond in SW Louisiana and expeienced the same thing you are now going through. I'm guessing that the pond filled quickly, before much vegetation grew on the bottom and sides. My pond filled within a weed after construction and was a problem clearing. Since you have already put fish in the pond I recommend against aluminum sulfate, incase anyone recommends it. You would probably lose your fish. The pond will clear up in time if you have the patience. As aquatic plants get established you will see the water clear. You can help this along by transplanting desirable plants around the shore and in the 3-4' depths. Do get the ph and alkylinity right and get ready to fertilize. My local fisheries biologist with the state wildlife and fisheries office, recommended winter and spring fertilization as soon as the ph and alk. are right. I am in the deep south and have a much longer and hotter summer to deal with for algae blooms. If you have any run off into your pond get yourself an aerator or fountain. You will need it to prevent fish kills in the near future. You may want to get in touch with your local Texas Parks and Wildlife freshwater fisheries biologist to give you very specific recommendations for your area. Good Luck!