Wow, 1 day can change a lot!
The vis today around 60' was not nearly as good yesterday due to all the classes stirring up the muck. I'm wondering if there were other divers down there before you who stirred it up? I have also seen where it's crystal clear down deep, you'll swim into almost zero vis, then a few feet later it opens back up again. Paulw and I did a lot of dives down at the deep end of the pecan grove last year and we saw a lot of that.