Ethos genetics

this can be the starting signs of a need for cal mag :) they look really healthy though pal si Its not a severe problem at all don't be so worried they will not die over night hehe it could also be a problem with your ph being a little high too or a sign of overwatering try to only water the plant around the base of the plant and only when the medium is really dry :) Best of luck im sure they will be fine :)