How deep to go front to back

[Mikee]

I would go with 30-36" for sure.. on my next tank either 48x36x24 or 60x30x24 keeping it at about 180g.. honestly i prefer to have it wider (36") and not so long its all about depth! I have a 90 (18" wide) and while its a great size for beginning i would really love the extra width. After seeing 30" and 36" wide i dont think i would ever go back to a 18" or 24" wide tank.