Grobo recommends that you use Reverse Osmosis (RO) or Distilled water.

This is for a few reasons: 

  1. Local municipalities have added compounds in the tap water that plants don’t use. This includes things like chloride, which can negatively impact your plant.

  2. RO and Distilled water is less hard and has less salt content, providing optimal conditions for your plant to grow.

You can use tap water and the Grobo will adjust dosing level as much as it can, but it can have severe impacts on the viability of your grow depending on your local municipality's water contents. You will also need more than one Bottle 2, as it will be used excessively to bring down your water's pH. 

Still have questions? Please see HERE for how to contact us.