rhodes68answered grow question 4 years ago Ah soil aint it a trip
Better pics would be nice but Ok wont try and tell you exactly whats up here as its far too busy with issues, can say is what I would do finding that in the tent.
First gotta get some run off to test and a good bit of it so its a decent sample however...
those roots look like they may be in trouble, I would get that run off using 0.5% H2O2 flush.
30C isnt bad enough to cause real damage just wont like it much, an organism could have set up in the pot though due to the heat thus the H2O2.
WILL NOT HURT THE PLANT
Like for use on your skin just keep it low less than 2% and this case does not really show it needs that.
Test the run off multiple times smell it just find out what you can from it.
That is what I would do just IMO the culprit may come out in the wash
Seriously good luck let us know