ShellyAnn,
These are a very typical type of solar panel. They can work EXTREMELY well if set up correctly. But I think 3'x9' is a tad small--you would need about 3 or 4 to work nicely on your pool. You should be able to figure out a rough'n'ready safe pressure. You want the max flow you can get, but you don't want to spring leaks.

The side valve does work well. With it, if you plumb correctly, you won't need valves like mine--but I WOULD put in a shutoff--like my ball valve--what you couldn't see in the picture, behind the support, there's a quick release. I can take down the solar panels in the fall and still cirulation the water that way.

I would totally ignore the 1-2ppm chlorine max. It's worthless. They are covering their back bumpers, but if you follow it, you will probably have a TERRIBLE time preventing algae. You see, if you have enough sun to run the panels, you will need stabilizer in your water. At even 20ppm of stabilizer, you need to keep your chlorine between 2 and 5 ppm.

Trust me, if you have enough sun to make your panels effective, you'll need 30-40ppm of stabilizer--and for that you need to run 3-6ppm of chlorine. Here, Chem_Geek can give you much more exact numbers than I can--he's done some great research on stabilizer levels and effective chlorine levels.

But my point is you won't be able to keep chlorine between 1 and 2 ppm realistically...unless you spring for salt-water generation of chlorine.

But given your pump and your pool, you should have no problems running your panels, keeping your pool clean and having a great summer!