[KoiCop]

Quote: Originally Posted by j_iwanto A bit confused, the 9 drops is GH... IF I add the baking soda, that would increase the KH (Which mine is a bit low at 89), which is fine right?

Now I'm confused, Pau, since this was your post #12:

I just tested my KH... it takes 9 drops to turn green., 162ppm. I suppose that is moderate hardness?

Now you're saying that 9 drops is the GH reading -- not the KH reading. Is that correct?