Fish Tank Hardness

Adding RO Right only adds electrolytes to the water. You need to control the PH and add a PH buffer. Kent marine who produce RO Right suggest their PH buffer but the natural PH buffer is sodium bicarbonate. This app does all the calculations for RO Right bicarbonate and both dGH and dKH so you can add Ro right to achieve a desired TDS or add RO Right to achieve a desired hardness value. It calculates both. But be aware the buffer bicarbonate will slightly raise PH as well as acting as a buffer.