are some of my plants dead already? :(

Bottle water is fine but watch out for ones with high sodium content as I think sodium can cause your rootts too lockout and stop taking in nutes which will stunt growth

I think you should ask people who are advising you too put their advice in simpler terms for you too understand better at the beginning cause some people talk a bit technically and fail too properly explain in a way that a newbie will understand
 
@haggis think of the nutrients as vitamins. They need trace amounts of these things to work. You need to be using a 5 gallon bucket to mix those nutrients and water in. Then you will have a proper nutrient solution to feed and water with. Always add the water first, never nutrients then water. That will convert them into a lock out state, a state the plants can not use. Always add any base/alkali additives to the water before acidic things are added. Acid to base is fine, but base to acid is a no go. Always add additives before base nutrients also. That means if you are using bloom booster, silica, cali-mag, or any other additive, those go in before the main grow or bloom nutrients.
 
The food source is light and co2 they bind the light to. That makes the sugar they use for life. Nutrients are not needed in anywhere the volumes they use water at. We are talking about teaspoons per gallon, sometimes even fractions of a teaspoon per gallon.
 
I highly recommend a grow book by Jorge Cervantes. It is good to have a reference manual on hand. Sound techniques for photos apply to autos as well. Autos just blend the stages of growth together more than photos do.
 
Water them until the soil is damp. Water again when you push your finger into the soil and it's dry past your first knuckle.
 
@haggis glad to help you grow. Make sure you are only water twice a week at most for the first few weeks. You want the roots to spread in search of water and nutrients. 100 ml of nutrient solution water each watering should be plenty for a few weeks.
 
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