1/2 gallon pot E&F

was going to clone then move to half gallon pots and veg maybe a week then flip. I wanna do like a sog type grow.can I use 1/2 gallon pots? Its for flood and drain table

If you have your flood table full of hydroton and partially burry the pot so that the roots can grow down and spread then yes. If it's just the pots then you will be limiting your plants potential.