I think I have decided to just go with a spray bar for my FX5. It going in 90G marineland tank, that has black painted back ground and I will use same color. Now to drill holes in PVC, for that matter get them all in same line. ha ha
I think it trial and error, and depends on where you like input/output for your tank, also what looks best to you. I have realized we can all try it as others suggest, but until we see it working is when we will know what works for sure.