H2O: Just add water (few questions about it...)?

Ok there use to be this really cool t.v. series on nick so I want to know why it doesn't come on anymore? Does it come on on a different channel? If so what channel? Do you know where I can watch season 1 WITHOUT downloading anything? Please I love this series and I really want to watch it again. I tried youtube.com but i only got to epi 3! Please, please please!!!