I'd just add another T8 bulb otr two e ballast are cheap for these etc or leave it and add a nice aluminum reflector or both.
That will not cost much, 4x 32 w lightinging is plenty.
Watwer changes: once a week 50% and dose 2x a week, about 1/3 teaspoon of KNO3 , 1/8 KH2PO4, 1/2 teaspoon GH booster, 5-8 mls of traces.
Dose right after water change and then once mid week.
That's about it.