New to marine

Hi and welcome to the forum.
If your tank has finished its cycle then treat it as though it has some livestock in it,
Put a little food in every other day, (to keep the bacteria you’ve cultured alive,) and small weekly water changes ( to keep on top of nitrates) and lights on during the day,
(Might as well get some of the inevitable algae phases out of the way,,
And start a tank thread so we can follow your progress 👍👍