well the back left corner is where my overflow spills in and comes through a foam filter. also next to that is my emperor 280 bio wheel filter. the water overflows through a DIY tray that holds bio balls( i have to redo it, i didnt make it big enough). the tray is removable for cleaning of the pump and protein skimmer (this pic i dont have the protein skimmer in, a little experiment). i have about twenty five pounds of LR, and twenty pounds of sand. for plant growth i have some halimeda clippings from my main tank,turtle grass,some kelp, and i cant remember the name but its some kind of feeding algea(it just floats near my overflow). for critters i have two peppermint shrimp, one sand sifter star, scarlet skunk cleaner shrimp, matrix crab, blue legs, and a shit load of baby turbo snails. in my sump i have a mag drive MD5 pump, 150 watt heater, and a sea clone 100 (i hacked about five or six inches off it so it would fit in the sump) protein skimmer. lighting im using a coarlife 24" 64watt PC fixture with a 50/50 bulb(it stays on for about 20 hours.
i think that covers about everything, if i missed something just ask.