I was wondering how to decide what type of tank shape and size is ideal for various mantis. For example, the recomended tank volume for adult O.s. is 100l. Is this suggested volume because the animal needs the space for roaming and hunting? Or is it more a matter of water volume needed to maintain good water quality? What shape of tank is better? For example, one that measures 12Lx12Wx12H verses one that is 24Lx12Wx6H would have same capacity. If one intends to hook display to a sump thus increasing total water volume does that allow for a smaller display footprint?
Sorry for the million questions and thanks in advance for advice!

Sorry for the million questions and thanks in advance for advice!
