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cobalt

  1. jaypeecee

    Cobalt and Nickel

    Hi Folks, I'm trying to determine if two trace elements - cobalt and nickel - are required in planted aquaria. Neither of these elements are listed in the index of Ecology of the Planted Aquarium*. Referring to James' Planted Tank**, I see that cobalt is present in both Seachem Flourish and...
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