you can either download it off kickass torrents or watch it on youtube
nickelodian or internet
You Can Try Veoh.com It has Most of season 1. or nick.com. but i think veoh.com is the best
At www.veoh.com
you can find h2o just add water on DVD at the shops but you have to buy it You can find h2o - Just Add Wather season 1, episode 2 and first 10 episodes from season 3 at: http://www.gtv33.com/2009/08/watch-h2o-just-add-wather-online.HTML
at http://www.yidio.com/show/h2o-just-add-water
you can watch it on turbo nick. nick.com/turbo
you can watch all season 1 of h2o here:http://youtube.com/profile?user=laurie826(plus some of season 2!!)ur welcome!!Full episodes of h2o - JUST ADD WATHER , full season 1 and 2 , and 10 episodes from season 3 you can watch here: http://www.gtv33.com/2009/08/watch-h2o-just-add-wather-online.html
at http://www.yidio.com/show/h2o-just-add-water
Here: http://tv.blinkx.com/show/h2o-just-add-water/hOpsLDonNRq7ZwD37Ms9z1vbo4E#s2e1hope i helped!PS: when you have finished with the 1st season on there, you can watch the 2nd season after :Panyways, again, hope i helped :)
http://vbox7.com/search/?offline=1&vbox_q=h2o+just+add+water&page=4
H2O: Just Add Water can legally be watched via Hulu and DailyMotion.
through links on http://www.yidio.com/show/h2o-just-add-water