Don't bother. It's no better than tap water and may cause problems. Don't make this harder than it has to be. Use tap water.

NOTE: DON'T use tap water IF your tap water is UNFIT to drink.
Perp Reviewed by Perp on . water from the koi pond? Does anyone think the seedlings would like this, if I let it come to room temperature? There's probably some good fish poop in the bottom of the pond! Rating: 5