I opened mine up yesterday for the 1st time(with fish in). Here is what I have and other observations:
I used that drain valve on the bottom to make handling to the sink easier. Just a piece of 5/8" hose & a bucket, and follow the instructions in the book for draining. Makes life alot easier carrying it.
I used to have some sponge in the intake strainer as a prefilter, but I took it out when I saw how much my Mbuna were "going"! I'm hoping it helps get more out of the tank.
I realized that I had my media arrangement backwards in relation to flow. I forgot it flows top to bottom in the basket area. So I reversed my baskets. I now have:Top, Ehfimech(I use this in my canister on another tank and it catches ALOT of debris without a major flow loss). Middle, Ehfisubstrat and a the course sponge. Bottom, Ehfisubstrat and polishing pad.
So far, I haven't see a noticeable difference in flow, but I just added the polishing pad, so time will tell.