Until a few weeks ago I would have recommended the Sand Dollar system because I'm running the SD60 on my 24' AG. Two weeks ago the tank sprung a leak on the bottom in one of the seams. Pentair told me I was out of luck because they only have a one year warranty.

I am aggravated with Pentair since there was not one reason for that tank to crack. I live in Southern Louisiana where the pool is running all year so the tank didn't freeze.
It might have split due to the fact that they match it with a 1.5HP pump which I had because I didn't know any better 2 years back.

My tank problem is probably an isolated issue but I wish the company would at least have some decency to stand behind their product. The tank is clearly defective.

Oh well I'm replacing the whole unit and going with a 2 speed 1hp pump so I should be better off anyway.

Good luck with the upgrade. BTW is the Pentair pump a 2 speed pump? If not, and since you are going to be getting another, it would probably be a wise choice. Many around here praise the 2 speed pumps.