Yes I did think about that. What happended with the old forum was that if a member wanted to discuss a health problem with their discus, he would add it into the Cichlids category (not diseases) and if they had diseases with their marine fish, they would list it in the Marines category (not diseaes).

I had to often go in and manually move threads over to the diseases category.

So to avoid confusion, they can discuss health issues in the fish species type category most relevant.