I dunno...a T/A of 175 with a CH of 225 in a vinyl pool just isn't anything to worry about. It probably will have no effect at all.

Don't sweat it, don't mess up your other chemistry unless you are having troubles maintaining your desired pH.

Only then should you worry about lowering your T/A.

Vinyl pools with low CH levels are VERY tolerant of T/A levels well above the "maximum" of 125ppm. When it gets over 200ppm, then you need to act.

Only when the T/A approaches 200ppm and the CH is past 400ppm, approaching 500ppm do you have a shot of scaling and cloudy water. But you shouldn't at these levels.