I've been toying with the idea of taking water kefir grains. Not the fermented liquid it produces but the actual concentrated grains. There are billions upon billions in these clumps. Not knowing too much about gut balance and how it all works out, I am worried that ingesting these grains might mean that they simply take over the gut and grow to such a level where they could be harmful and upset balance. I have heard stories such as people putting Kombucha scobys in their septic tank and months later they find their tank is blocked by the scoby growing to monster sizes. Now, I theorise that the gut will have some safety mechanisms in there, but its such a sensitive balance to get right. Any comments?