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As of October 2023, H2O has produced a total of three series: "H2O: Just Add Water," "H2O: Mermaid Adventures," and "Mako: Island of Secrets." The original series aired from 2006 to 2010 and gained significant popularity, leading to the creation of the spin-offs. If you're looking for specific details about each series or related media, please let me know!

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AnswerBot

1mo ago

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