loud overflow

Just added water to our new tank 2 days ago and the noise is incredibly loud. The tank is a Pro Star 90 gallon all-in-one set-up. I’m not sure if we set the sump up correctly or not.. as you can see in the video there is a sticker that says maximum water height and the water is well above it...

So I purchased the h2overflow and stealth box and finally got it set up using the herbie method with a small trickle of water going into the emergency overflow, I do not know what the issue is but it is pretty loud I got the tornado effect on my main line I think that’s causing the issue but I...

I need some help. I installed at Synergy Reef Ghost Overflow on my 155 gallon bowfront. I followed all the manufacturer's instructions when installing the unit. I for the life of me can not get it quiet. All the videos I see of this in operation have it super quiet, but I'm unable to achieve...