125 gallon **need a mentor**

[kien]

^ +1 what she said. Plus, I will add that, if you have the means to do a sump at this early stage (ie, you have the space, time and money), then I don't think there is a reason NOT to use a sump. If you can do a sump now but decide not to, you will probably regret it later once you get going and start wishing you had a better place to store your heater/skimmer/reactor/ATO, etc. At that stage in the game it will becoming annoyingly difficult to install a sump.