Bryan,
pH is a measure of free hydrogen ions, or how acidic or basic your water is.
Alkalinity is measure of carbonates or bicarbonates, your lake's ability to buffer against acid.
Buy gypsum through your local feed store or co-op. They will order it for you.
Where you are, gypsum works well to clear muddy water.
Have your water analyzed, then decide what to do. Your local county extension agent has a form to fill out, with a check for $20 to the Soil Sciences Lab at Texas A&M.


Teach a man to grow fish...
He can teach to catch fish...