The file '120mm Fan Ice Crystals 3D Printer Model' is (stl) file type, size is 14.8MB.
My daughter was showing me something similar on Etsy that she wanted for her new PC build, so I decided to make an attempt in Blender with geometry nodes and such before buying the premade version.
The initial export, though full of non-manifold geometry, was still printable in Cura. To address the non-manifold geometry, I voxel remeshed, then ran a limited dissolve to reduce the poly count. I included both versions of the STLs to try.
Your results may vary.
(Update: Since I'm using geometry nodes, it's easy to create random variations. I added another version to try out, you'll need to scale this one manually by 200%.)
fanice_v2_fixed.stl | 2.4MB | |
fan_geonodeice_variation3-1.stl | 2.6MB | |
frost_fan_print1.stl | 21.8MB | |
frost_fan_print_non-manifold.stl | 1.2MB |