I am getting back into the hobby after many years. I used to have a 115G tank with plenty of space. Now I am set up with a nano 20G long. I love LPS, especially Euphyllia corals and I am trying to fit as much as I can into the limited space. Is it OK to keep Torches, Hammers and Frogspawn closely spaced, or will they damage each other? It seems like I see contradictory information about keeping them separated (at least torches), but I see tanks where they are bunched together. Any perspective is appreciated. Thanks!