Dream sump

[BlueTang<3]

so i managed to find a 6 foot by 3 foot by 1 foot (lxwxh) 2" drilled sump in the alley lol it is in great condition in the new year will be building the tank into the wall and having the sump in the next room and just wondering how would you design it as per putting baffles in ?? i am going to leave a area in there and get a mantis shrimp and need a area for the bubble king skimmer going to run the pump external just wondering how to place the baffles and what height water level needs to be 8-10 inches for skimmer