help me plan my sump

[1337cr3w]

so, i just bought this sump off of fishkeeper(saskreef) and dont really know what to put where, i hvae a caralife 65 skimmer to put in there, i dunno if the heater goes in there or not?? i would like to try and get some sort of feed plankton refuge going in the sump if possible im still not clear on how those work. in the pics red stand for eggcrate that is just in little groves for it so its removable or replaceable with glass or whatever works, the black hole is the intake on a lid that covers that section. lmk your thoughts.

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