Ive tried all the suggestions and nothings worked. I have gotten it so that the primary drain pulls a pull siphon and water level is as high as possible. The weir is still continuing to make a waterfall sound and its driving me crazy. Im thinking about add enkamat but am not too sure about it. Any suggestions?
It’s about 1.5 inches. I read that people put enkamat in the internal box to quiet it down.Im not sure where you mean to say you are going to put something like enkamat. If you do decide to use it, be careful not to put it somewhere that it could cause the aquarium to overflow if the enkamat gets clogged and restricts water flow.
Is the water level in the overflow box a lot lower than the water level in the aquarium?