That filter looks like mine. There should be a pressure gauge on top. Take note of the pressure after you cleaned it, when it gets 7 psi over that you need to clean it again. Add that to the list of stuff you do every week, check the filter pressure. Usually it rises slowly, except in pollen season it may climb quickly. Also, if I had to shock, on the verge of algae, it may climb quickly as it is clearing dead algae from the pool.
A hint the pool inspector told me, when you are replacing that clamp around the center, first clean the o-ring really well and lube with silicone lube from pool store (I use disposable gloves to do this), then as you reassemble it, tap lightly with a rubber mallet along the band as you are tightening it to help it settle in. When the band closes completely and still drips, you need a new o-ring.
Sorry, I deleted the post as I went back and looked and saw it was a Pentair Clean and Clear Plus, from looking at the picture. Girl you are too fast for me. 
The Quad is configured just like the C/C but the cartridges are made of a different material.
Re greekgranny's post... that filter may also be a Pentair Clean and Clear Plus and that would not use any DE or other media, it works just fine with clean cartridges. My carts are just too big to find any way to soak them at all. I have used a spray filter cleaner but now cannot find more of that brand, most I find are soaking types and I'd need a 60 gallon garbage can to hold these fellows.
To spray it off, use that small brass nozzle that you will find a photo of here on the forum somewhere. Very cheap and just the right thing.