MatataMingi wrote:@Mukiri,
The water kefir grains were growing slower when I was using the Bottled mineral water from Nakumatt.
However, I stopped using this water and instead started using my tap water. This comes from a borehole that is situated in the hills at the Vipingo Golf Resort. This water is rich in calcium, lime and other minerals. (Egg shells are calcium). I filter this water, then boil it.
As soon as I started using this water, the growth of the grains went WILD.
Thanks for the email. I will get in touch. I assume you live in Nairobi.

That was my advice when you first asked about what water to use. You said you didn't have the time; glad you changed your mind. However, your experimentations says a big something about those bottled purported mineral waters and by extension chlorine which features greatly in municipal/county water.
Yes I do and soon might be a neighbor in Kilifi county.