Re: Pentair IC20 enough for 12,000 gallon pool?
In general, a bigger SWCG is better. The reason for that is that it generates the necessary chlorine quicker. The result is you turn "down" the output dial, resulting in far less on time. That means your cells will last longer. I've got a cell rated for 40k gallons in my 12k gallon pool, and I run usually at about 15% output. I'm sure my cell will need to be replaced soon, but it's on it's fourth year and I think it only was intended to be a 3 year cell (based on the warranty).
Make sure a swcg won't invalidate your new pool's warranty first. Also, if you have a heater, make sure it's one rated for use with salt pools.
rectangle 11.5K gal IG concrete pool;; 125sf cartridge filter; 2hp 1 speed pump; K-2006, k-1766; PF:10
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