Depends on your bioload, but I’d be surprised if 1% daily water change were enough to avoid much in the way of required nutrient export or mineral/trace additions. I moved to using the DOS for AWC about a year ago also. I don’t do as much per day as you propose, and in my case it was solely to reduce the drudgery of manual water changes. I still have to employ the same arsenal of nutrient export mechanisms and run my CaRx just about full out.