Aquarium Filter Media Bio Balls Ceramic Rings Biological Filtration Kits For Fish Tank Pond Pool

Description: Name: Filtration Kits Color: as shown Material: Ceramic Size: bacteria ball about 1.7cm to 2cm, bacteria house about 1.8*2.2cm, technology ring about 1.8*2cm Applicable scenarios: fish tanks, aquariums, turtle tanks, etc. Scientific ratio: help to promote the growth of colonies and provide a good environment for beneficial organisms Packing list: Filtration Kits*1 bag Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.  Manual measuring,please allow 1~3mm error,thank you.