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  1. Equipment & Supplies
    BLUF: Why would a sponge filter in a big tank with a good sump be completely uncycled after a year? I have a 210G African tank that's filtered with a 40G Fluidized K1 sump. It's been running for several years and is quite mature. I also keep two large sponge filters in the tank on a battery...
  2. General Aquaria Discussion
    Monterey Bay Aquarium Research Institute Discovered by the Monterey Bay Research Aquarium Institute, the harp shaped sponge lives 2 miles below the sea surface and uses velcro-like barbed hooks to catch its prey. Named Chondrocladia lyra, this carnivorous sponge can be found in the deep waters...
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