Poret Foam in Sump

[Harry Muscle]

I'm thinking of setting up my Aqueon Proflex 4 sump with Poret foam. It's the foam used mainly for matten filters. I'm wondering if anyone has used this foam in their sumps before. Did it offer the low maintenance that's supposed to be offered by matten filters?

I'm thinking of using 6" worth of total foam in 10, 20, 30 ppi to support a 112G planted tank. Is that enough or too much?

Lastly I'm looking for input on which size to get. My sump cross section is 13 3/8" wide by 12 1/2" high (with open space above). Ideally I'd like to get the 13x13 sheets but then I would have a gap. I thought of filling that gap with a 1" think sheet of foam but I'm not sure if doing that would allow the foam to hold itself in place like a single sheet.

Any other input anyone has about this kind of setup or possibly a better and/or cheaper setup which reduces maintenance is highly appreciated.

Thanks,
Harry