BROWN huge spots on leafs, M problem?

Hi again guys, a little help here please.

This little princess is with these brown spots, can it be a N defency or toxity?

They are on 12/12, Alga Boom nute in every water, PH is OK, humidity is 75%( i know that is way too wet, but cant make it better)

She is in the 2º week in 12/12




Thanks again

brown patches could be phosphorus def, take a look at that.