Well, there was a dumb question--sorry. I mentioned it to my wife, who handed me a brush! Of the things I have maybe learned in life, if there are any, seems I missed the practical.
Mike

Right before I had read this post, I was deciding whether or not to clean my pro 900 filter.

The one that came with mine is a bear to clean. I did add a row of brushes which catches alot of junk. Also, I added a matala mat cut to size that is much easier to clean. I used the blue matala but the white or gray would do a better job. I left the original mat in there as is does catch alot of junk.

It is so hot and sunny out right now, I talked myself out of cleaning it!;)

lsst - your attitude is great. Of course, my having that attitude is what allowed my filter to get so bad.

You reminded me and I ordered brushes today as well. I have a lot of debris to contend with and need some help.

Been reading about Matala on the forum and intend to go that way too. Did you just drop it in front of your green mat? Why the Matala and the green mat--I think I know that answer. AZ Ponds sells the mats in pairs only--any problem with using two of them? Can I assume more matting doesn't affect water flow very much? Where did you find yours?

I think the Pro 900 skimmer is great but worry what will happen to the line now that it has been taken over.
Mike

I still use the old mat as I guessed with the blue matala and the green original mat's fibers are closer together.
This is my plan. I plan on ordering the white or gray matala mat and use the brushes closest to the skimmer weir then the blue matala mat and then the white/gray one last. I really think that will do a great job.

I found the best price at Blue Iris Watergardens.

Here is a link that might be useful: Blue Iris Watergardens

The extra mats did not affect the water flow at all. I am very pleased with my pro 900 but like you, wonder if they will stop making parts as the Pondsweep line has been bought out.