[i have crabs]

i have a 160 and my space was a bit small but the skimmer fit, problem i have is where the pump pulls water in is very close to the baffle and restricts flow if i move the skimmer at all, i dont know if the 160 and 180 have the same base size or not but id make shure you have at least an extra couple inches on the 1 side at least,