thanks Brad..i had the stand built custom for me..i wanted to be sure i could get in it from any side..i have doors on both ends..i also made it tall enough to remove the skimmer cup..i wish it was about 3-4" taller..it is hard to work in there because of my plumbing..the stand is already very tall.. i was worried it would be too tall, but it is almost just right..i built a stand for the closed loop..it sits near the top of the tank, but out of sight..i put it near the top to eliminate head loss from the mag12