Is your tank level?
 

My tank is level from back to front, but is slightly uneven from left to right (5 feet length). Bubble in level is still within the centre lines, bubble touching one line. So we are talking very small amount, but of course I could always see on the water level of tank.

It was level during install, but after water and rock, it changed. Now in saying this it has been 6 years, and it hasn't changed any more. So I am not worried, just curious on how many others had this happen.

FYI: my tank is in my bonus room over the garage.

This sounds familiar. I think we've had this talk ? :-) Ya, mine is unlevel too. About half an inch (from each end of the 6' length).

level
 

place a wave maker or wave box in the tank and never notice it again.my tanks are perfectly level(used my laser level)

Mine is a 1/4 inch out at 6' length but in summer it's level lol

Minde is slightly unlevel front to back. It's been 5.5 years though, so not too concerned.

Level ish.

Mine's not level, but I'm not concerned. Only noticed it last year....

mine is unlevel back to front 1cm:sad:

I still think about it exploding just before I nod off for the night .
http://http://i1343.photobucket.com/albums/...ps11cc9eb0.jpg

Not leveled in both directions, like twisting is worse.