The mesh appears to be around 100 microns (0.1mm) and is held firmly, albeit with some permanent creases, in the plastic rim. The black wire that goes to the buttons is fine too. The plastic handles on the ends of these wires fall off almost immediately (I don't think they were glued in any way), and a few of them crumbled (the plastic fell apart) when they were first picked up. So I use these little filters without handles and so far they are fine. Things like rotifers go straight through, but there's brine shrimp and copepods.
Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
37 Review
Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review
Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review
Greenpro Micranthemum Monte Carlo: Live Large Pearl Grass Aquatic Plant In Tissue Culture Cup For Freshwater Fish Tanks And Aquariums
49 Review
Aquarium set 6.8 l (lighting, cover, filter) Tetra Cascade Globe Duo Waterfall black
19 Review
18lb BLQH Aquarium Gravel River Rock with Pebbles Stones β Natural Polished Decorative Gravel for Garden Landscaping and Ornamental Rocks in Mixed Colors
12 Review
π³ Hygger Betta Log: Resin Hollow Tree Trunk Ornament for Betta Fish Tank Decor, Wood House Aquarium Accessories
9 Review
π AquaticHI 27-Inch Aquarium Tongs - 100% Reef Safe - Multi-Purpose for Fresh & Saltwater Fish Tanks - Clip Plants, Spot Feed Fish & Coral - Keep Hands Dry
9 Review