I only drank Strawberry and Kiwi Perfectly Clear for about 5 months on CD but had to give it up when I got rid of my car as I couldnt carry as much of it when I went shopping. It never affected ketosis or my weight loss and I would still be using it now if I had a car. My local Iceland has it on special offer too at 2x2L bottles for £1.
Now I drink Kiaora orange squash with no added sugar as at least I can carry bottles of that easier. It hasnt affected my ketosis or weight loss either even though it has citric acid in it. I would still drink the Perfectly Clear though if i could, it was one of the best tasting flavoured waters ive ever tasted, no chemical taste like on some waters you can get.