Planted Tank Guru
Join Date: Dec 2012
Location: Hot Springs Ar. 71901
If it's just one leg that has no support, then you do need to shim it. Twisting a
tank will break it quicker than any other odd thing which might be involved in setting up one. If I'm not too far off onthis one, the legs have round iron disc at the bottom of each ? First place the tank(empty) and the wood on top of the stand and check for level. You may need to add shims to other legs to get it level.
Then those rubber caps which you see on crutches are good for the ends of the legs
but you will need to take something the same size as those round disc to the store/w you to make sure you get the rubber caps that fit.
While there get also some washers just a bit smaller than the round disc.
I would also suggest you get(can be from the same place if you are getting the rubber caps from like Home Depot) a sheet of 1/2" foam insulating and cut it the same size as the bottom of the tank and place between the tank and plywood. It will help take up imperfctions. After you have measured the gap n the leg that doesn't touch the ground
you just place enough washers to take up that much space into the rubber cap before you put it on the legs, but ony put the washers in the short one.
Then check for level. If one end is higher than the other, place one or two washers under the (both) legs on that end. These are seperate and not included in those for making one short leg longer. Then check for level again, repete if necessary.
After it is level AND the short leg has been accounted for, the tank should be solid.
This is all without water etc in the tank.
The shortest distance between any two points is a straight line...in the opposite direction...