ok so i decided to build a stand for a 75 gallon tank (48x18). i wanted it to be a little taller so that i could see into the tank better without having to break my back to bend over so i went with 35inches tall. well now that i have the 2x4 frame done, i'm wonding if its going to be too top heavy and make it unstable. when i started i was thinkin that the 18 inch width would keep it stable, but now not real sure. you guys think it will be ok? i rent so i can't really hook it to the wall but def don't want it tipping over as my kids run by either