Newbie advise needed... Diary of a new tank junkie

[Melonbob]

I somewhat disagree. Two drains are ideal, but I wouldn't give up the real estate in an 80g to drill another one. Put in a stockman standpipe on your overflow, and you aren't going to get blockage from a snail. I've had at least 10 tanks now, including 5 at once and never had a blocked overflow. I build the standpipe without gluing any of the pipe, and take it apart every once in awhile and clean out any buildup. Two elbows will slow your drain a bit, but its pretty standard to have two 90's in a drain.