You are spot on. I have done the same and although bigger pot came out wit 7 to 8 Oz's. That lasted me a long time but I missed growing so much. Now I do 1 month veg then I flower. 3 gallon pots 4-5 plants at a time. Always different strains every grow. That keeps it fun. IMO.
Its all about mimicking nature. but you have to do it inside that's the key to it genetics and seed are a big part of it but he can mimic nature then you're not going to get the best bud Imo. I have it at degrees when the light on and 7275 when its off and then for flower I put it on 70 degrees...
IMO light degrades it the fall. That's why I lower my lums. I get lots of color and trichromes when I do. You can do it anyway you want and get good bud. This is just what I do.
They will be fine but Ds doesn't have the micro nutrients that rain water or distilled water with added micronutrients would have I'm sure it's not a problem but rain water is the way to go. IMO.