Currently available on 2 streaming services.

H2O: Just Add Water - watch online: stream, buy or rent

Currently you are able to watch "H2O: Just Add Water" streaming on Amazon Prime Video, Netflix.

Cast

Phoebe Tonkin
Cleo Sertori
Cariba Heine
Rikki Chadwick
Indiana Evans
Isabel "Bella" Hartley
Luke Mitchell
Will Benjamin
Burgess Abernethy
Zane Bennett