Yeah, but it's all the same block. There's no real skill or planning needed to set one up. Also, you'd need 56 Obsidian. You can't just make one tank.each open blocks tank requires 4 obsidian per 2 tanks, that means, in order to make a 3x3x3 tank, you would need 54 obsidian, which is kindof a lot, not to mention the glass.
IC Multiblock tanks took time, planning, and a lot of different blocks to put together. That's all I'm saying.