I have had to replace my aquarium 3 times in one year due to leaks. I live in Mexico and am using the most popular brand of 30 gallon manufactured here. I can't beleive that 3 aquariums could have gone bad. I am beginning to suspect that it is not a problem of the aquarium but maybe the stand is not level. However, the stand which was custom built by a master cabinet maker out of 4x4's is level and appears to be absolutely flat on the top. I am becoming very discouraged. My fish are currently in buckets as I debate buying another Mexican tank or driving the 500 miles to the US border in order to buy a US made tank. And I have gotten to the point that I am now wary of any glass tank with seams and debate whether acrylic or glass is the way to go. Can anyone offer any advice.