So, hopefully in the near future I will be getting a whole house R\O system because my tap is at 430 ppm
hardness and 85 nitrates. Anyway, the R\O will bring the hardness ppm
level down to 0... Basically, my question is can freshwater fish (mollies, guppies, CPD's and Danio Erythromicron after my plants are grown.) thrive at 0 ppm
Thank you, everyone!