The dvds aren't out yet but I found the Links hope this helps you.
1.The Awakening
link 2. Jungle Hunt
link 3.Keep your Enemies close
link 4.Valentines Tag
link 5.Big Ideas
link 6.Secrets and Lies
link 7.Happy Families
link 8.Kidnapped
link 9. The Sorcerer's Apprentice
link 10. Revealed
link 11.Just a Girl at herz
link 12. Crime and Punishment
link 13.To Have and To Hold back
link 14. Mermaid Magic
link 15. Power Play
link 16. The Dark side
link 17. A Magnetic Attraction
link 18.Into the Light
link 19. Breakaway
link 20.Queen for a Tag
link 21. The Jewel Thief
link 22.Mako Masters
link 23. strand party
link 24. Too Close for Comfort
link 25. A datum with Destiny
link 26. Graduation
link H2O behind the scenes series 3
link Here are the episodes and bonus behind the scenes of the new series. click on free user wait for a couple of Minuten and it will say click here to download and then Du save it!
The other one just type in the code and in a Minute the download will appear enjoy!