water is good, but if the water is too warm they get slowed or killed, the best is to have the water in room temperature 23°C-39°C in cottons, very wet, dont put any thing else in there, and the seeds will germinate...
I have recived seeds from different seeds companys and i had the experience of not germinating seeds, this happens if the seeds are too old. Or if they are premature, or bla bla bla, many different things can happen.