Loved it in my 18g... ditto on the detritus... vaccuum parts of the sand during water changes, but never more than a third per change. Also, possibly double the amount of light you think you'll need, black absorbs where white reflects. I ran 2 x 96w power compact quads and it was my favorite tank of all time. I had a great 65g full of stonies and lush growth, but it was always the 18 gallon that got the wows. Lots of people here saw that tank.