How to increase water hardness ?

[emmie943]

My tap water is at a low hardness, Ph and Kh. For the ph and kh I have been adding baking soda during water changes and this has worked well for a couple months now. I would like to increase the hardness for the guppies and snails. This tank is also planted with red swords, dwarf Sagittaria, dwarf hair grass, ludwigia repens, and dwarf baby tears. What would you recommend to increase the hardness?

 

[brendenscott]

Gh booster. I use and like the gh booster that nilocG sells.

 

[nirbhao]

I also use NilocG's gH booster. You could also add aragonite it crushed coral to your filter.