Eheim 2217 leak
So I have been using an eheim 2217 for about a year now. Bought it used. It's been a champ the whole time. Decided to take it apart for a quick cleaning which it needed. After putting it back together I've found a slow leak that wasn't there before. This happened with my eheim 2026 also. Every time I clean it, something would leak, I'd take it back apart, reassemble, leak stops.
I found the leak on the 2217 on the quick connectors for the input line right at the base. It's dripping about 1/4 cup of water a day but is a pain to clean up every day. It's dripping right where the two lines meet where you screw on the plastic tightening nut. I've disconnected it and reconnected it three times now thinking maybe I didn't tighten it enough. Aside from buying new quick connects, any ideas on how to stop the leak?