With a bare tank you really shouldn't be stocking more than 120 1/2" fry, sixty 1" fry, or forty 1 1/2" fry. I would start with at least one large 4" cube sponge filter, air powered. I've found that with fry below 1/4" box filters can be a hazard, they tend to get trapped & can't fight the current. That's a pretty heavy stocking rate, and nothing to try to exceed, as with that stocking 50% water changes weekly would be needed.
Pick up any cheap magnifying glass so you can keep a good eye on development, if you see any chopping of fins or other signs of deformity reduce stocking or increase water changes.