Quote Originally Posted by CarlD View Post
Thanks. No thanks. Yes. While PoolSean is the best on it, I think 50% to 100% greater than your pool's size (16k) is more than enough. With some, like mine, you can mix and match controllers and cells to get the ideal setup. If I were to decide to, I could put a bigger capacity cell in my manifold and just re-set the controller to run it. This unit can also act as the pump's timer, and, I believe, select between high and low speeds, but I didn't mess with what was working fine. It can even run an acid injection pump, too. May also brew the morning coffee, but I have not gone that route yet....
Like yours, the Aqua Rite has different cell size options that can be used with the same control unit. I believe the three options are 15k gal, 25k gal, and 40k gal.

IMO, while the 25k gal size would probably work fine for a 16k gal pool (though I don't know how the spa impacts this) the 40k gal size cell would offer the best value as it would last the longest.

Toy builder, though I only have first hand experience with the Aqua Rite, I'd have no problem recommending either brand based on what I've read.