Post pictures of your beloved catfish aquaria here. Also good for pictures of your (cat)fish rooms or equipment discussions. If you are posting pictures of identified catfish, please do so in the appropriate husbandry and reproduction forum above.
i have never used the blocks but did run one of the cell-pore cartridges in my emperor 400 hob filter and later as part of a diy filter. it worked well for bio but was kind of hard to clean and was real brittle.