> My observation in the past was that when some one has very hard water
>(over 450ppm) in their aquaria they have a smaller chance to get ulcer
Only problem with water that hard is that is starts to screw other things
up. I think once you hit ~600ppm Ca/Mg it messes with some
physiological aspects of the fish and thus fish raised in this water tend
to be weaker fish. I forget the actual details though of what it is exactly.
> Peter - isn't mycobacterium the organism that causes tuberculosis?
>Actually, if I remember my short course in microbiology Mycobacterium is
>a genera of bacteria that cause diseases like tuberculosis.
I'm buggered if I know. :-)
Tootles
Peter