My water parameters out of the tap are ph 8, kh 9-10, and gh 9-10. I have used my tap water in the distant past and could not grow plants well with DIY CO2. I switched to RO water with Gh additives from green leaf and baking soda for Kh. It was one of the best decisions I ever did...
Safe-t-sorb and Vermiculite Set Up
Soil Set Up