On Sun, 27 May 2012 11:54:55 -0700, Bob F wrote:

I use a 5 (or more) gallon plastic bucket. Some pool chemicals come in
larger sizes which might immerse the whole filter. Your pool supply
place might give you an empty.

The larger filter diameter is pretty big.

Let me google for the diameter given the part numbers:
Sta-Rite System 3 Model S8M150,
259 sqft cartridge 25022-0203S
191 sqft cartridge #25021-0202S
Total = 450 sqft /sqft = 125 gpm@50psi max.

OK. It looks like it's 18 inches in diameter and 20 inches long:
http://www.amazon.com/Sta-Rite-25022...mming-Filters/
dp/B004CTVXFQ

Large Filter (25022-0203): 259 Sq.Ft , Diameter: 18.25", Length: 20-1/8"
Small Filter (25021-0202S): 259 Sq.Ft , Diameter: 25.5", Length: 12.5"

That's a big bucket!