There is no season 4 however, there was a spinoff series called Mako Mermaids.
The three seasons of H2O & the three seasons of Mako Mermaids are currently (August 2015) streaming on Netflix.
Rikki and Zane go out in season 3 of H2O Just Add Water. H2O Just Add Water aired in the United Kingdom and Australia.
at http://www.yidio.com/show/h2o-just-add-water
I am sorry to say that there is no h2o just add water season 4. Although there are rumors that they will start filming season 4 in November 2012. But don't take my word for it cause they might just be rumors.
just watch it on youtube
on October 26 2009
There is only three seasons on the H20 Just Add Water DVDs because there isn't a fourth season.
No, a 4th season of H2O: Just Add Water will not be coming out however a spin off version of it called "Mako: Island of Secrets" is currently in the works.
he will in the fourth season and there will be 8 seasons total and a movie
Never. It only lasted three seasons.
Nope, there is no 4th season of H2O: Just Add Water.
If you are in England you can watch h20 just add water on nickelodeon or you can watch it in youtube just tipe down h20 just add water season 3
Rikki and Zane go out in season 3 of H2O Just Add Water. H2O Just Add Water aired in the United Kingdom and Australia.
Mako: Island of Secrets will come out in late 2012, sometime after the finale of the fourth season of H2O: Just add Water.
Nope, no one is in H2O: Just Add Water's 4th season because they never made a Season 4.
You can watch it on Hulu.com/h20-just-add-water
The begging of season 3 of H20 Just Add Water the movie it a 2 par eppisode of eppisode 1 season 3
There is no season 4 :(