I figured 'Splash-Less' meant an improved bottle, but the bleach is like a syrup, and causes major foaming in the spa. The label otherwise looks just like the other Chloroxs, says "regular" and "concentrated". When I finally looked, the ingredients say Sodium Hypochlorite and Sodium Hydroxide (no %). It's as if they've added glycol to it but the Chlorox company would only tell me it's not intended for spa use. So I'm back to step one, after being in the TFP groove for several months. At least Chlorox is sending me a refund, of sorts.