I have a Emperor 400 and was wondering if there's a type of sponge I can buy to use with this filter ? I have seen several people post here that they use and love sponges on their filters and I wanted to try to use a sponge but I dont know what to look for :help: . I tried going to my LFS and they had nothing that even looked like a sponge just the regular Emperor 400 media filters (blue with the carbon inside)
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