Reaction EFU-25 Filter issues

[mortikahn]

Ok so I have one of these filters running on my 75Gallon tank.
JBJ Nano Cubes Chillers and Lighting

Now I have it set up with the spray bar running vertically in the corner using only 1 of the 2 spray bar sections, angled towards the front glass.

Here's my problem. The Fluval I have on my 20Gal Long makes the water look absolutely freaking crystal clear.

The water in my 75Gal, looks dingy, little bits floating in it, kinda hazy.

Now is the problem the vertical spray bar?

I tried putting the spray bar across the back, using both sections, but the hardware provided puts the spray bar almost at the middle of the tank along the back glass, and looks like complete crap.

Is using a single section of the spray bar restricting the flow too much?
Should I see about enlarging the holes in the spray bar a touch?

Would it be best to try and modify the elbow to position the spray bar along the top edge of the tank, and use both spray bar sections.

Or, is this canister filter a big pile of doo-doo, and I will never have the water quality that my Fluval provides?

I'm really at my wits end with this. I love the way my 20gal looks, and I would love for my 75Gal to have the same water quality.