Not a whole lot at this stage, just waiting for them to get bigger and making sure they're healthy. Put some clay pebbles (hydrotone) around the small cube to block the roots from light exposure.
On day 11 the roots were ready to expand from the bottom of the rockwool so I put them in temporary 2 gallon buckets. Had to get a couple new ones from the store still 😅 Made sure to fill the water right up to the roots and had the air stones going!