Bad watch, probably won't watch again, and can't recommend.
This is another one from the land of bad dubs, which is confusing because most of the text on their shirts and anywhere else I can see it is in English. Point of order: do not get obviously grown women to use their real voice when doing voice over for children, it is distracting as hell.
I understand what they were going for here, and the actual premise itself is fairly interesting. Giving a family control over each element is interesting, and the "pixie dust fountain" thing is equally interesting, but they just sort of left it at that. There is only a couple of scenes with the girls' magic, they don't necessarily do anything to have the characters relate to their elements, and the "sisters infighting" trope is distracting as hell.
The "contention for a magical location" trope is fun, but it turns into more socio-political war amongst the children than any actual conflict that would have been interesting.
There is a fair bit of focus on their "pop career" which was not impressive enough to warrant screen time, it honestly would have been better to have just SAID they performed.
Good idea, bad execution, but I'm sure we'll see an acceptable American remake for no reason soon enough.