I made a spraybar with black plastic tube for my Eheim Classic 2250 canister filter, the tube is 43" long, I drilled 10 holes of the same diameter of the original Eheim's spraybar. The DIY spraybar goes almost all along my 82 low-tech planted tank and my perception is that it's working great, I see no restrictions at all.
My 2 cents.
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Green thumbs up !!
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