With pots that massive in comparison to the small seedling I'd be very careful and avoid giving too much water. Any over-watering will deprive the roots of oxygen for weeks and stunt the growth severly.
Or you could go with the small peat-cube made for seedlings route. Transfer to bigger pot, once the seedling is bigger to give the plants more opportunity for root-gas-exchange and the soil dries up a lot faster. Good luck on your next grow! ๐
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