Water must sit at least 24 hours to release Chlorine, and if there is chloramine, then you need a Reverse Osmosis or RO water filtration system. Both are toxic and will kill any plant.
Water should not be exposed to light as it can then create algae like microorganisms that can also attack plants. Make sure your water is good. It I said possible to get a report from your local town to find out what the water consists of. Do not take this lightly as this is the main cause of all failures for new growers. Water and its quality is important.