Cheers guys, mine is a large corner one at the moment both kittens can use it together but they sometimes queue.
I use standard litter catsan it isn't bad stuff and I change and clean the trays regularly and clean it after very poo.
I learn something new almost very day on here

I knew the Bengal cats were very big, apart from them I thought cats were of a similar size with little variation. I really do need to get out more
I put the new hodded litter tray in the corner of the room discreetly hidden behind a chair, seriously I thought it would be ideal.
Not to worry. I don't think its worth buying replacement filters though, unless any member feels differently and why.
Sue