I’ve had a 63 gal for about 1 1/2 years now and the only major problem I’ve had is a blue-green algae bloom during the first month.
I am kind of tempted to do a ‘mountain stream’ themed tank with vallisneria , hillstream loaches, and white clouds, although the loaches could be a tad pricey…
Maybe a large school of neons with some SAEs and Amanos, and maybe a couple of cherry shrimp??