I have always used bottled water for all my grows over the past 10 years or so. I use tesco value 17p for 2 ltrs. And had some fantastic results. 10 lsd in now @4 weeks
I am on day 21 from seed. 10 b/f lsd fem all taken. I always use bottled water to make up feed and once a week use carbonated water. Always had good results from this method.