According to our SIP that we did Tap water grew the best but others say that Distilled water or rain water..... I don't know :)))) just suggesting
I like to use water that I boiled plants in. It has nutrients (extra) in it that give make the plant healthy.. As everyone knows. But otherwise, just use plain tap water.
Problably regular water I'm doin a class project about this and the ones with regular is making it grow.