wilma 4 pot question

hi guys,

i was hoping for some advice. i have a wilma 4 pot and i was wondering if you can get away with planting 2 autoflowering dwarfs in each pot? will they compete with each other and is there enough room for both root systems?
please advise as i am new to hydro and only have one fairly productive soil grow under my belt. many thanks!
 
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