I am moving from a Juwel 125 tank with the Juwel internal filter to a different larger 
tank but it has a new external filter Eheim 2213. Does anyone have any advice as to how I can get the external filter populated with the bacterial populaton of the juwel which has been running for years!
tank but it has a new external filter Eheim 2213. Does anyone have any advice as to how I can get the external filter populated with the bacterial populaton of the juwel which has been running for years!
