YUDICPCat Water Fountain Filters 8 Pack Pet Fountain Replacement Filters with Resin and Active Carbon for Automatic Flower Water Dispenser Drinking Fountain

I have ordered the branded ones, these ones are smaller and lighter so they can either be in the correct position but then you can hear the water constantly or fill the reservoir so there's no noise but then the filter floats and doesn't do what its supposed to.

Try to get it as a replacement for my petkit water fountain, checked the measurements before I bought, but it is still a bit small. Needs to tear up the old original petkit filter for the base plastic tray in order to fit in the fountain. But generally still do the job.