For a 90 gal I would go for the BM150pro at $379 this comes with the aqua bee pump
Or the NAC6a this comes with the Atman.
The NAC7 might be a bit over kill on a 90 gallon system as its rated up to 250gals
All depends if you are after a cone over a cylinder also, but my BM150pro is kicking ass have a look at it in my tank build here
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