Design #1, That's the way my tank is being done in the next 2-3 weeks, with eurobracing

#2 It looks longer.
If you choose #1 make the length 6 feet that way you can keep tangs.

i like #2 as that is how i am building my tank but on the long side 72" :mrgreen: lots of surface skimming is good

Do you mean extend them, but not all the way to the ends? I'm going to have a tee and an elbow in there for each of the three drains, so I have to make sure there is enough room.

I like #1
In #2 If your return is under water like that you will need to also figure out a way to stop the syphon when the pump shuts off

I would use a lockline to move it to the surface. It will be higher than the water level (or right at it)

I like #2 better. Technically it should be stronger since you don't have a corner cut into the glass that will be a stress point(even though there's very little stress with 1" of water). Lots of people with #1 though that works great for them.

Love the size of both though, very wide. Will make a great reef.

i like design #1. only cause its pretty much exactly what i have. you can see pics in concept's thread (pics 11 and 12). it is 60x30x24h

http://www.canreef.com/vbulletin/showthread.php?t=82418

Numero Uno

I am going to throw a problem in here. design 1 has two inside 90 degree corners in the back pain, which are inherent stress points in cut glass. so in-fact tank 1 could actually be weaker on the back.

as for looks tank 2 will look much cleaner from the front and a coast to coast overflow is nice for a few reasons, better surface skimming and also because of the extra length it has more volume. the only issue I have is how are you doing your returns in number 2

my vote is for design 2

Steve