30 gal freshwater compatability? Pictus and clown pleco?
There is no cause for concern. The water from the fish tank is highly unlikely to harm her or your future child.
There are zoonotic diseases that can be transmitted to humans from fish. They're pretty uncommon. If your tank is healthy it's unlikely she'll have any problem at all.
Really, all you can do is wait and see if she develops any symptoms and call your doctor.
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