Well my hydro guy told me that I wouldn't need CalMag if I used regular tap water so not sure what you want to do there....I know X-C just recently went to RO....was he using CalMag before he switched? I didn't start using it until after I went to RO water.

You can soak your hydroton in water adjusted with baking soda or vinegar to fix ph. That won't be a problem for the soaking.....just rinse them afterwards if you go that route.

Also...if you don't have H202....stick that one on your list. ....
for future: Reverse and penetrator