I have just got a new Eheim classic 2215 to replace my Juwel reo 125 internal. my Juwel has a course blue sponge and two fine blue sponges which presumable bacteria grow to take care of the ammonia and a green nitrate sponge the new Eheim has a white filter black carbon filter and six course blue sponges am I missing something or will they do the same job?
confused please help
confused please help