No honks just gray water

I was able to get a great swim in this morning going 1300 meters which is only 200 short of the race distance but I didn't really have a chance to attempt the extra 200 because the water slowly started to turn gray while I was swimming and it was my time to get out after the 1300 meter mark. I guess there is some kind of senior water aerobics class at 7:50 every morning and they just look at me waiting for me to get out of their pool because the second I get out the lane ropes come down and they start to move in slow motion.....I mean do their workout.