Hm, you've got a rather finer grade than [USER=1]@The Traveler[/USER]'s 177μm. You still may be able to clean it up somewhat if you've already performed the conversion.

Firstly, the celite bed helps catch these smaller particles before they reach the filter paper.

0.2 and 0.45 μm Luer-lock syringe filter cartouches are fairly easily (if not cheaply) available, e.g. Whatman Puradisc FP 30 mm Cellulose Acetate Syringe Filter, 0.45 µm, Sterile, 50 Pack, 10462100

These can be used after the celite filter to pick up more of the smaller particles.

If you've yet to perform the conversion it's also possible to wash the zeolite before use. Swirling in ethanol and leaving it to mostly settle will leave much of the tiniest particulate content in suspension for decanting off. Do this at leart three times, or find some coarser zeolite if all these cleaning steps start to look too tedious!