You're standing on the bank and you're looking straight into 6 feet of clear water. Just on the other edge of those weeds is a drop off to 14 feet of water.
I don't have the official 8-inch Secchi disk but I spent a few hours today staring at the display of a depth finder and the pond. The water is clear. I decided to take a white filet board and tie it to para cord. Anyone guess the clarity from the pic below?
9 FEET!
Here's the thing - I bet if I had the disk it would be greater than 9 feet. The edge of that board is thin and nowhere near 8 inches.