air pump?

I like to keep it about 2-4 inch below the netpot unless you are starting a plant where the roots have not dropping the right at the bottom of netpot then lower a few inch when roots drop
 
Oh ok so its not really needed to be really deep, also those air stones u said i need for of, what size were u referring too? Theres small medium and large :) thanks CO
 
I use large always. I will show them in my water rez video soon. They work awesome. The more air the better.
 
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