I have a problem, I think? My 5 acre lake has visability exceeding 10 feet! It's totally spring fed, 45 yrs. old, has lots of coontail, and is 25 ft. deep at deepest point. It was a pay lake for many years, so I know there are fish in it. I would really like to knock the clearity down ALOT! I have not had the water tested yet for ph, would this be the first step? Need advice please! My goal is TROPHY BASS, with a b-gill forage base. I've read "Raising Trophy Bass" and with my situation it was a bit unclear to me exactly what to do.