So when I setup my cor 15 I used the 1 1/4 union, reduced and 3/4 ID barb then used 1” ID vinyl tubing to connect to my return line barb on the Red Sea 525 assuming not using the two 90s would give me better flow. I’m running the pump 100% (tried with stock return output but now using vivid aquatics and flow splitter) no tangible flow difference as I didn’t have to adjust my drain valve)
The 1% feed mode still flows water to display and wanted a true stop of flow without shutting pump off. Searched and found a thread here suggesting a T and valve to have small flow from manifold into sump so at 1% the flow there would stop flow into display.
So I decided build manifold off the pump and continue with soft tubing. Quickly realized the height means I have to use a 90 elbow barb to make it work. AND now I need a new union as the other is useless.
So 2 questions.
1.Should I just go hard plumb to just below the return barb and use 4” soft tubing to mate them and also prevent vibration
2.If I used the provided 3/4 slip and use all 3/4 fittings. Am I making a difference in flow? How much am I losing?
I was trying to go as far as I could with 1 1/4 before reducing to the 3/4 going into the display tank to maximize flow. I don’t understand fluid dynamic well enough to know if that’s the right theory.
Thank you!!
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