Laffs......On one of my 20gal grow out tanks on the bottom rack-the cats use it for their water bowl-(
they like fish flavored water)....lol.....anyway....they must drop cat food crumbies in it when they drink because the fish respond to them like they do me at feeding time...kinda funny to watch and I often wonder if any of the cat ever got their tongue bit....
.lol.....and cat hair...geeze....when you have as many cats that I do (
29) in and out of the house....I have lots of cat hair in my tanks and it has never caused any problems for the fish or tanks and I use a topical flea/tick drops every 3 months in the winter and monthly in the summer-never has been an issue....