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pond matrix

  1. Freshwater Aquarium Equipment
    Changing my 180 gal salt to freshwater. I had bio balls in the pipe to the sump. Recently saw the Seachem product pond matrix. Might it be a good idea to use it in the pipe to the sump (which is basically a wet dry), and/or in the sump? Since no more protein skimmer, I have a lot of space in...