I am looking to buy a new tank to host live rock, some coral, fish, and maybe some other stuff. Right now it seems where we want to put it that it only will fit a 55g all though if I could make 2 more inches of space I could get a 75 =. I might need to go get a custom one made but my question is this, if I did end up stuck with a 55 would it still be an okay size tank for the live rock being that its only 12" wide?