First let me say this my wife has 2 cats yes I hate cats I will not lie... anyway....
it's funny this tread came up reason being I do have tops on all my tanks ,
the stupid cats never climbed on any of my tanks and I have had them for years,
this morning my wife came running into the bedroom screaming , she says one of the cats went for a swim , me being half asleep it didn't register , well I woke up to find the cat wading trying to get out of the tank , I broke out laughing it was hilarious ,why my wife didn't get the cat out is beyond me , so I grabbed the cat by the scruff of its neck got it out of the tank , put it down the stupid thing ran straight into the wall , I think the tank climbing days are over . I think it will think twice about doing it again
well luckily it was only my breeder/feeder tank or I would have drown the **** cat right there and than , other than a busted top and lots of hair floating looks as if everything is ok , so if you think a top will stop a cat it wont, it may slow them down but in the end he will go for a swim ,
it was really odd this tread popped up than my wife's stupid cat had to test the theory
think I may just buy a cheap video surveillance camera and put it over the tanks , cause I think it would have been funnier seeing the splash lol .