Found some tanks!

[Iconz]

I don't know anything, but to me, it seems that one in the side might actually drain better? I can also see where it would be more noisy though.

The reason i say that, is because a hole in the bottom NEVER gets any air in it, its just gravity-fed. Right? If that is correct, I would think it might be a little slower draining, which again, may be a better thing, I really don't know how much flow you need! :p

[seahorsedreams]

Without a standpipe you will hear the water hitting the bottom as it drops and you could also get the toilet flushing noise without a means to adjust it easily. Not sure what you mean by one side draining better.

[Iconz]

Sorry! I mean a hole in the back of the tank vs a hole in the bottom... Looking up what a standpipe is now, and how it works!

[Iconz]

K, i figured out what a standpipe is...
http://www.dursostandpipes.com/

[seahorsedreams]

I also made a thread on here of one I made if ya wanna have a look. Same idea.

Renee's Standpipe Thread

[Iconz]

awesome! I actually read through that a couple days ago, didn't know what I was looking at at the time, but Learned shortly after!

[lReef lKeeper]

here ya go man, this is pretty cheap for one of these ...

http://www.captivereefing.com/showthread.php?t=4037

[Iconz]

I've already got my 20L bobby, but thanks anyway!

[stevebla]

Don't buy the 55 they are to narrow. I wish i had gone with a 75 to start!