Air Pot sizes for autoflower grow?

[budbro18]

Im growing auto: ak47, white widow, lemon skunk, and himalaya blue diesel in a 2x1.5x3.5 foot grow box under a 150w hps light. Im planning to buy some air pots but dont know what size to get to maximize yeild in my small grow area. I wanted to grow 2 or 3 at a time. Some are feminized and some are regular and i plan on pollinating one to get some more seeds. Ive grown before but never used air pots.

bluntfacekillah

 

[Twelve12]

You can try 1 gal or the 2 gal.

 

[budbro18]

^^Thanks for the help. i decided to go with the 9 ltr. (2.3g) air pots cause theyre all about the same height, plus or minus an inch, but bigger diameter which is what i need.
hope to post the beginning of my grow sooon!