If it's not level that means less water in the tank. Less water means less pressure. No worries. I am a carpenter and we say "good enough for government work". :grinyes:
^ When you add water to the tank, therefore weight, things will change. In my experience it is best to level the tank in all directions as close as possible. Between the lines is fine framing a house. We're talking glass held together with silicone. The more you stress the silicone it will eventually "give" over time. http://www.monsterfishkeepers.com/forums/showthread.php?476634-EMERGENCY-GIVE-AWAY!-Virginia-P-U
^ When you add water to the tank, therefore weight, things will change. In my experience it is best to level the tank in all directions as close as possible. Between the lines is fine framing a house. We're talking glass held together with silicone. The more you stress the silicone it will eventually "give" over time. http://www.monsterfishkeepers.com/forums/showthread.php?476634-EMERGENCY-GIVE-AWAY!-Virginia-P-U
So you're saying that you have to level substrate and balance rock work? Tanks can be off a little. If it is rated for 55 gal. and unlevel you can only get 50 gal. in it. Less pressure.