MartinOC
Insert something suitably witty here
Just brew with it. FFSGiardia. See without even knowing that how does it get into your mums tank water? Like I mentioned its surprising how many dog chewed bones I've removed from my gutters thanks to Crows. I sometimes here them rolling down the roof into the gutters after Crows have lost their interest in them. The odd road kill too, small skeletons. Gut parasites! I wont take that risk. Even if i was desperate there is that haunting thought in the back of my mind. Along with all the decomposed possum turds and bird **** etc... Probably all nothing to worry about though.
It can only add to the flavour.......