Ok got a quick question and i already know the answere but i am wondering if i can maybe avoid having to do it . My tank has been in it's position for almost 2 years now ,75 G btw, in the living room on carpet i have wood blocks underneith the metal corners with acrylic shims on top the wood, i have noticed that the tank level isn't what it used to be when i originally set it up , I just did a measurement from water surface to spot on tank edge , at the back the measurement is 1/2 inch at the front it is 3/4 of an inch this is consitant through out the tank , basically it is leaning to the wall 1/4 inch , I am aware this stresses the rear panel . queston is should i drain the whole tank and try to relevel it or might it be ok ? it has been this way for quite some time now almost 1 1/2 years . Now that the carpet is settled heh i can try to shim the stand in the back with some more acrylic shims . This is going to take me eons to try to do not to mention having to once again drain the tank down , i just did it last week to change from CC to DSB , should have releveled it then but spent the better part of 6 hours change over and clean up . Any input is greatly appreciated , Don't want my tank to pop , If i have to i will level it again , just wondering if this is an acceptable tolerance of if it should be 0 tolerance... it is ok . Thanks for the input
input please
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Are you on a concrete slab, or a wooden floor?
There is another possible solution if you're on wood :idea2:
There is another possible solution if you're on wood :idea2:
well the tank is in the livingroom , sitting on a carpet floor with wood blocks under the corners , (metal stand ) and then acrylic ontop of the wood so the stand doesn't sink into the wood , i have a crawl space not a basement , 3 weeks ago i went underneith the house and suppoprted the beams because the floor was to bouncy , i didn't change the level of the floor mind you just shored it up . the rear of the tank is close to an inside wall that has big main support for the house. So as per sitting on concrete nope , wood yeah kinda there's wood on each corner and wood under the carpet 
thanks for the help
thanks for the help
It is possible to take a small hydraulic jack into a crawl space, put it under a floor joist and lift the floor.
If you've already shored-up the joists under the aquarium for stability, all you would have to do is add very thin shims along the length of the shoring under the joist(s) closest to the back of the aquarium.
You would want to have an assistant upstairs to avoid over-correcting the situation you have now.
If you've already shored-up the joists under the aquarium for stability, all you would have to do is add very thin shims along the length of the shoring under the joist(s) closest to the back of the aquarium.
You would want to have an assistant upstairs to avoid over-correcting the situation you have now.
Please be very careful adjusting the flooring. While most of the time this is done just fine you can cause cracks in your sheet rock and other problems. Especially if it just uneven because of carpet compresssion and not the floor being uneven.