upain Aquarium Filter Bags 20 Pieces White Mesh Filter Media Bags with Zipper for Activated Carbon Biospheres Ceramic Rings Fish Tank

Total waste of time if you're wanting these as bags for carbon, as the holes are too big. I filled a bag, and about a 1/3 of the carbon came out through the holes. Did end up using (hence I didn't return), but waste of a few quid I could have invested in something better. Hey ho. (By the way, what is 'sheerness' when I'm reviewing?! What does that even mean?)

Useful medium size bags for aquarium media.Nice quality

Excellent quality used for active carbon, good size.

happy with product and service

Fast delivery. Used inside the filter in my pond to hold media.