I agree with Mathew and don't use a spray bar. They are good at agitating the water surface and increasing oxygen levels at the surface but there is little water flow deeper in the tank. I have my outlet 1" under the water and pointing slightly downwards.
I put a tiny amount of flake between my thumb and finger and put my hand deep into the tank and slowly release it to see where the water is moving. In my 60 gal
with two canister filters I was surprised at the odd angles that gave me the best circulation. All tanks will differ depending on the decor and planting of course. It's trial and error, there is no right and wrong way.
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