Like a few people said, it'd make a good tank for a kid's room. They might like it more than a natural look, and it's not a bad hobby to get them involved in, since it teaches patience, responsibility, and can foster an interest in science and nature. Though if you end up with a house full of MTS sufferers, none of you you will ever be able to afford retirement!
Now if it were going to be a display tank in a social area of the house, then yeah, I can see saying it's rubbish, it's not as attractive of a display for that use. I wouldn't have it in my living room, looks like a child's toy. Now, I say this when my mantlepiece has Optimus Prime and Illidan Stormrage action figures on it, so I'm a huge hypocrite.