Spots on leaves

I do have a few more leave like that. Also have some that have turned yellow . I ve be using nute in a spray bottle I spray the leaves before bed. but the one that seam to react are not seeing as much light bottom of plant. But I hate it always picking of th yellow leave i'm using Liquid Nutrient Trio Soil Formula Big Bloom, Grow Big, and Tiger Bloom from foxfarm
 
So Can I just use water to make them happy its 27 to 28 degree in there and I got filter going out the tent and an intake fan coming. I post another picture of another leaf. Thanks In The Shed
 
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