Im talkin about tubes. Now that i think about it if i buy the 65 gal tank, i will blow alot of money of course so i may only buy like a 30 gallon and that will save me money on some of the equipment i figure. The other thing though is that the smaller the tank, the more frequent the water quality can change. So in other words bigger tanks are better for beginners. Man i need some help figuring all this shit out.