This is my Nu-Clear 533 w/25 micron filter an 547 BIO filter with a
Blue Line 55 HD 1100gph pressure pump. The Nu-Clear has a 1 inch
in/out as the the Ocean Clear has a 3/4 inch in/out. I've never had a leak
with my lid. It's best not to use any pvc elbows if possible and I learn the hard way when I built a "Bottle Neck" with pvc it look like at the end of the filter >----< This will create a friction that kept my water temp in my tank at 90F 24/7 with out any heater.
