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  1. Equipment
    So I did a carbon switch on my 55 gallon and 20 gallon. During a water change I took out the carbon out of my 20 gallon and threw it away. I then took out one carbon thing from my 55 gallon and placed it in the 20 gallon. (The 55 gallon holds 2 carbon, while the 20 gallon holds only 1 carbon.)...
  2. Equipment
    Hello; Purchased Eheim Liberty 200 while looking for cartridges found that the carbon cartridges have use span of 4 weeks only. That seems a bit much, doesn't it? Is there any harm to leave it longer?
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