The water purring into the overflow makes a lot of noise…
Raise the standpipe up till the water level inside the OF is just under the teeth
Next, in the sump where the water enters, it is bring down a lot of air with the water which makes a ton of noise.
See attached pic.
On the top of the standpipe I drilled a ¼ inch hole on the cap. I have tried to cut back on the air that goes through that hole hoping that this will fix my problem but it did not, but the water level inside of the overflow dropped. Any ideas?
Drill the hole out large enough to accept a 3/8 in poly tube. Slip it in and superglue it to hold it tight. Then run this to below the stand. If it's still noisy put it into a milk jug as a muffler.
And here is a pic of it up and running.
I know that the pictures are hard to see but the water is coming from the pipe that is in the back, i wraped a filter around it for a prefilter so all of the bubbles now are very small but many.
Thats what the porpouse of the firstset of baffles was. Stop the bubbles as well as a place for arock rubble piile. You left those out unfortunatly. The T may help it though.