Hi, I have a roughly 500gal aquarium that I need to level on a slightly unlevel Concrete floor. What material can I use to shim my stand that won't rust out if gets wet and can handle several tons. Not wanting to relevel the concrete. Thanks
Type of shims for leveling large tank.
- Thread starter Lucas&kim
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I've used these composite shims. http://m.homedepot.com/p/8-in-Composite-Shim-Bundle-of-12-SHM1-12-TW/202807695
Same ones I used, they work great! I considered metal washers but worried about them rusting and staining the floor.
Jerk contractor started sloping the cement floor way too soon towards the floor drains. He was long gone before the stand was put into place. 
It is a massive stand made out of 3 1/2" tubular steel. We had to double up on the shims in some places. The stand is so massive, there was zero movement of the stand even before shimming. I trust these shims, but will recheck the tank level before filling the tank.
It is a massive stand made out of 3 1/2" tubular steel. We had to double up on the shims in some places. The stand is so massive, there was zero movement of the stand even before shimming. I trust these shims, but will recheck the tank level before filling the tank.
I'm not a shim expert, but my gut says I don't think shims are designed to be stacked like that... I would think they could slip on each other unless you are reversing the stack (can't tell from the picture). That many shims just seems unstable to me...
Given the gap pictured, I think I'd custom cut a piece of pressure-treated 4x4 to wedge in there.
Given the gap pictured, I think I'd custom cut a piece of pressure-treated 4x4 to wedge in there.
I have the same composite shims under my stand stacked, its not an issue. Those composite shims are okay when they are stacked because of the shape of them and the grooves on them. You just simply reverse directions with them as you stack them. With that said obviously you don't want to stack them overly high either. I do have one spot on my stand where I have 6 shims stacked and what I did was to just put some 5 min epoxy between each just to be on the safe side. Then again I am quite OCD so lol.....