The Kame Genki Filter, using zeolite and activated carbon, is suitable for aquariums up to 40L and provides clean water. - Brand: GEX - Model Name: Kame Genki Filter - Applicable Water Volume: 40L or less - Filter Type: Zeolite & Activated Carbon - Features: Helps to purify water - Intended Use: For keeping reptiles and amphibians This was an accessory for a reptile enclosure. I am selling it because I don't use it. Thank you for looking.