[Whodi]

I'm going with a 10 gallon hydro system. Do I fill the container with 10 gallons of water, or how much exactly; and is it ok to use garden hose water? Do I have to change the water often or just when I go from veggie to flowering?

How often do I add nutes; once every 7 days or what; Do I have to change the water when I add the same type of nutes, or just before I switch to the bloom nutes?

Oh, and do i run the air pump line into the water or where?

Thanks