storm0075 wrote:THe only problem I have noticed is that I must not have put it all back together quite right because it is a little wobbly.
Make sure you have the filter pressed down all the way, otherwise the dome won't sit evenly.
I've been making my own CatIt filters since the three-packs are expensive and don't last very long. They're a little tricky to make because the manufactured filters have the filter media glued onto the cartridges. I use a nylon mesh that presses the media onto the cartridge when it's crammed into the slot and that works as well as the glue. I can make about a hundred replacement filters for $20 which is a lot cheaper than three for $8.
One problem with the CatIt is that the water level under the dome (not in the bowl) determines how much water is added to the system. If the filter gets clogged, the bowl will fill up while the pump will keep on sucking the water out from under the dome. The dome sees the water level dropping down there and adds more water. Eventually the system gets overfull and starts to leak.
I'm guessing that's why the regular CatIt filters don't do a very good job. The thin filter media keeps passing water even after it's saturated with gunk. I'm using 200 micron filter media which does an excellent job of keeping the water clean, but it doesn't pass much water when it's clogged. The next one I make, I'll punch some holes in it so some water will keep on flowing through it even after it gets clogged.

