Yes, I am with you on your theory before empirical data. Just a little extra cautious about my aquariums.
Sorry, MY cats poo is inappropriate. They are indoor cats but their number one job seems to be protecting the home from the giant invading critters that came when our lovely landlord spread 8-10,000 lbs of dead landfill soil. (e.g. crickets over 4", a block away they are 1/2"). I don't even know what most of these weird critters are or what they are feeding on, we have lost our shed and a section of yard to the spiders now. The bugs are also chemical tolerant. It's not getting in my aquariums. Someone else may have experience with cat poo, mine seems an excessive risk.
How do you feel about Garden Center bagged manure? Properly cooked of course.