OK, that's not what I meant by an IMG link. Hard to explain in words, but if you click on any picture in Photobucket you'll see a section off to the side for "sharing". In that area of the screen is a field called "IMG". The text inside that box is the link you copy & paste into a post.

Ok, pumps and filters. There is no hard and fast rule for selecting a pump/filter combo, just some general principles. The main thing you need to size for a pump and filter (and match the filter to the pump) is flow rate (measured in gallons per minute or GPM). So if we want your 12k gallon pool to turn over the water every four hours, then you need a MINIMUM flow rate of 50 GPM. That's the minimum amount of flow through the entire pipe system, pump, filter and returns. Since it looks like your pump/filter pad is closely attached to your above ground pool, then you I would say you want to find the largest 2-speed pump and filter combo that gives you a minimum flow rate of 50GPM. I'd size it a little bigger (1.5 times my need) and look for something that can produce a 75GPM flow rate.

Then, as stated in my previous posts, BIGGER is BETTER for sand filters so get the biggest one you can afford. A 2-speed pump is way more desirable than a single speed pump since your power consumption is dramatically reduced at lower RPM's. And, as I saw in your pictures, you should really consider replumbing everything you can with straight walled PVC and ditch the flex-tube connections. Straight PVC has lower head loss then lots of long flex tube runs.

That's the best advice I can offer. There are other users on the forum way more knowledgeable than me about pumps and filter and I really hope that they will chime in and correct any inadequate advice I might be offering.