i had a couple small plants that looked EXACTLY like that.
how long have they been in those pots? did you just transplant?
i think my problem was rootbound.( didn't transplant soon enough)

something else, might be unrelated, but it cant hurt...
if you're using tap water, let it sit in a jug with the cap off for a day or so.
tap water is high in chlorine which is no bueno. letting it sit open for a day will evaporate the chlorine.(plus itll be room temp, which is good too)

hope your ladies pull through!