The rules are the same. You just use amounts for 175,000 gallons. You will probably find that using 12.5% liquid chlorine will make the job easier. It's the same as bleach, just stronger.

I need to re-check my figures but I believe 1 5-gallon carboy of 12.5% Liquid Bleach will add 3.57 ppm to your Free Chlorine level. Of course, 1 gallon will add 1/5 of that.

Using powders and pucks will give you the same problems with lowering pH and raising CYA too high that they do in smaller pools.

You WILL need to check your levels every day, probably twice a day and adjust as needed.

I'm no whiz with bather load, but that too has an effect. Be sure that babies in diapers are NOT allowed in the water. And watch for little kids urinating in it--hard to avoid.

I would tend to say run the FC closer to the high end of recommendations because of the bather load, to keep the pool sanitary.

Hope this helps.