CS>     Tuberculosis.. caused by a high PH level, I guess.  Well, that was
 CS>     what I came up with after ruling out all other causes listed.. so
 CS>     I got some stuff to lower the PH.  Hope I never see that again!
Not sure about where you're at, but here, the good aquarium stores will test 
your water for you for free, and advise as to high or low ph, nitrates, etc.
You might want to ask them.  You can also buy kits to test for this.
If you already knew all this, please disregard.
William
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