A lot depends on the actual dimensions of the tank and how you intend to fill it up with live rock and the like. I am assuming the tank being a 120 is 4' X 2' X 2'.
Next is this a reef ready tank or can it not be drilled. What about overflows? I like the Hydor Koralia power heads. They come in 4 sizes and range from 28-50 dollars. Magnetic base is a real plus.
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