I have outside air and Co2 scrubber teed straight into the Venturi which I do have ball valves on both lines. If I try and close them with this new pump/impeller it creates a lot of micro bubbles. Like I said I have the water level wide open so I can’t adjust the water level in the skimmer lower. When I had the old pump/impeller the water level in the sump was close to 9.5-10 inches. Just now I lowered it to 8 inches(the recommended height in the manual) and the overflowing just about stopped. Hopefully I’ll hear back from Ecotech and see what they say. But it seems like I will have to make a platform so the skimmer is higher so I can keep that 9.5-10 inches.
While I was writing this post I did some investigating. It’s the impeller that causing the issue. Just replaced the new with the old impeller. The skimmer is working like it was before. No overflowing and I can see the water level line in the skimmer.
Don’t know what to do now. Do I keep the old impeller in even though there is some discoloration?
The first video is with the new impeller. You can see the bubbles are much lower then the plate, which when I look closer is also escaping the skimmer body.The second video is the old impeller. You can see the bubbles start above the plate.
Old impeller