Hi, I’m not sure if I’m posting in the right place on here! I’ve had my tank up and running for just over 2 months, the skimmer was working really well and the cup was full every few days. A couple days ago the part that you twist to adjust came right off and I can’t find it anywhere, I’ve been told you don’t need it on anyway but since it’s came off there’s nothing been collected in the cup. Can anyone help? Thanks