That’s amazing. I like them very much too. Can’t say I have used them for aquarium stands, or in high weight tests. However, I use them for temporary stands within my garden shed. Since space is limited, and shared with tools, bicycles, etc., I do a seasonal rotation between two lawn mowers (can’t explain why 2 and not just one) and a snow thrower, summer outdoor furniture, etc. The crates and some wood do the trick beautifully. All my crates (about 12) have been gotten as discards at various places, and all say ‘property of this or that, penalty…..”’. But they were being trashed and I picked them.