i used a 1 inch peice of vinyl tubing slid up tight on each side and siliconed it, i'm not to worried about leaks it will be in sump, i think i'm gonna try and find some of that marine goop, the 2 part epoxy dries hard and i think the flexing of the bucked made it come loose, but it worked fine in the collection cup, but if i cant find the marine goop or a reef same type of "glue" i'm just gonna drill holes on the outside lip of the bucket and the "dome" and zip-tie and silicone it. i'm on pretty much a zero dollar budget. i'm gonna try to hunt down an expansion coupling today,