Hi, I'm new here and am considering getting a Red Sea Reefer 525 XL as my first reef tank. One of my concerns is the metric plumbing the tank comes with. I know several folks have replaced most of the plumbing with standard fittings and pipes but it seems they have retained the original o-ring quick disconnects. Has anyone replaced all the plumbing (including plumbing within the tank and overflow) with standard plumbing? Thanks in advance.