Manchas en las hojas

if you were using RO water like you mentioned in one of the earlier comments, then i'm pretty sure it's calmag (or the lack thereof).. you have interveinal chlorosis on some of the leaves (the veins on the leaves looking green, while in between it's turning yellow) which is a sign of a lack of magnesium, while the necrotic spots can be caused by calcium deficiency.. it also looks like some of the leaves are yellowish due to a possible nitrogen deficiency.. I assume you switched to bloom-nutrients right away with bloom? Don't forget that at the beginning of bloom there's also a streching phase in which the plant requires nitrogen, which usually bloom nutrients don't have too much of.. the switch to bloom nutrients should be made after the stretch once the plant starts building the flowers and fattening up the buds.. Not sure how much you feed her, but i'd up the amounts of nutrients a tiny bit and lower the amount of water. 1 liter per plant per day might be a bit on the high side, but for that you should check how dry the medium gets in between waterings.. Preferably you should measure the EC of the nutrient solution of the run-off.. 27 to 30 degrees is a bit on the high side, but should be still in the "ok" range.. you really don't want it to get any higher than 30 though, and even with 30 it might be better to add some co2 to the environment.. happy growing!