I'm doing 4X/ week on my 5.5 and that seems to work fine. I scoop out a cup and pour in a cup.
I went back to weekly on the tens for a couple of reasons.
Doing daily water changes I neglected the other maintenence. There was never an hour where I scraped the glass, blew off the rocks, etc, . Also when I did the first weekly change after a while of daily changes I discovered that a lot of detritus had accumulated in the return pump chamber/aquaclear (two different tanks). Draining those chambers down and adding a gallon of fresh saltwater really flushed a lot of crud out of them. When the crud hit the tank I could see polyps opening to feed.
I'd also clean the 5.5 since the equipment was out.
I think either way works, but my personality requires I block out a period of time dedicated to doing the tasks necessary to have the best tanks possible.
Obviously that's just my opinion........