JBL GreenStop for the JBL internal filter ProCristal i30 contains ready-to-use filter cartridges with special filter medium for removing of pollutants from the aquarium water.
+ green water is caused by floating algae. The cartridge withdraws the nutrients from the algae which makes them disappearDo you have questions about this article ?
+ suitable for JBL ProCristal i30 internal filter
+ needs to be replaced on a monthly basis
+ one cartridge contains 25 ml algae combating filter material
+ available as set with 2 or 6 cartridges