So I need so input on my new 75 gallon tank; it is on hardwood floors on the main floor. This is my stand... My tank is now filled and cycled with sand and plants in it. I don't think that shimming is possible with the stand that came with my tank. What should I do? is it safe to leave it like this? Is the bubble on the level that bad? Also, my 36 gallon upstairs was unlevel and took about a year to "settle in". Does this happen with new tanks?