90% or maybe even more of your bacteria are in your filter media.....thats why you should not replace it until absolutely nessessary.....i have some filter foam that is 4-5 years old
I've got some sponges that are nearly 30
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90% or maybe even more of your bacteria are in your filter media.....thats why you should not replace it until absolutely nessessary.....i have some filter foam that is 4-5 years old