Looking at the sump, I noticed couple of things.
1.Try having the overflow pipe come even with the water, ti minamize the bubbles in the sump.
2. I dont think you have enough water in the sump to go to the tank. What im saying is you tank will drain the waterthur the overflow. once gravity takes over.
If you have any of the piping blocked off open the lines to the sump wide open.
What are the overflows are they 1" pvc or 1.5 "
rule of thumb is 1" pvc will handle 750-1000gph
1.5 " can handle1250 to 1500.
But IME/IMO add more water to equal out the sump...
Now saying that on my tank i have a 3MD with 1.25 PVC and it works good and that is pumping around 500 gph.
IMO
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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