Chucky324answered grow question 10 months ago Hello. Yes, distilled water is fine to use but, distilled water is made by evaporation, this removes a lot of the oxygen from the finished water. Make sure there is oxygen reintroduced back into the water by way of shaking up the bottle before pouring it on the roots. Cannabis and all house plants like lots of oxygen in their water. If you have 5 gallons or more of water, put a air bubbler in to the water a hour before you water. Chuck.