My double cone 150 gave me problems getting it to run at a stable level. After a month, it started to run pretty well. After another month I gave it a maintenance cleaning to get the algae and coraline buildup off the inner walls. Now I'm stuck trying to tune this thing and my previous settings are not working. If I set the venturi to 4 turns, I'll overflow or get super wet skim even with the wedge wide open. I have to run it at 2 turns or less to get keep the thing from acting up with the wedge very wide open. And even at that, I don't get the fine micro bubbles, they collect and form giant bubbles all the way to the top which seems to hinder creating a good foam head. Not to say it wont create foam, it will, but doesn't seem to be running at its optimal performance. Here is a video of it running.
You can see the very large bubbles, like the size of a thumbnail. I have not cleaned the skimmer for at least 30 days so its had plenty of time to break in again. I have it at 7", where the silicon tube coming from the wedge pipe is just underwater. I have a 140G display with 40G breeder for a sump. What am I doing wrong?
