discolored areas showed up fast today. can't get a definite answer looking through pics of problems. please help, I'll post pics and basic notes. ty

here's a few pictures, transplanted to a 7 gallon 2 weeks ago, she's not over or underwatered. i ph all feeds/waterings to 6.4-6.5. gave epsom salts in one watering so far., and only fed her once w/ 1/2TSP ff gb and 1TSP of ff bb... happy frog soil with a little extra perlite. humidity has been between 45-60 and temp in my grow tent is always between 73-80 degrees F.... any suggestions? no discoloration this morning, so it all happened while at work. i see no visible bugs.... thanks in advance