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ceramic rings

  1. Nano Reefs
    I have a lot of spare ceramic rings and bio balls from my fresh water tank. As I am new to salt water could I place these in the bottom of my sump to collect beneficial bacteria? Or would they be a disadvantage?
  2. General Reef Discussion
    I'm planning on doing a scheduled 10% water change tomorrow and would like to remove my ceramic rings. My question is: Can I remove them all at the same time or do I need to do a little at a time? If I remove some now and some later, how long do I need to wait? I have a 28 gal. Nano with 20...