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Old 10/15/2020, 04:37 AM   #1
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Join Date: Apr 2011
Posts: 149
Cadmium and Aluminum?

I am trying to figure out what will cause Cadmium and Aluminum in tank?

Last test showed on June 16th 2020 showed Cadmium 1.16 g/l; Aluminum 4.60 g/l

now on October 15th shows Cadmium 3.20 g/l; Aluminum 1.59 g/l

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Old 10/19/2020, 01:52 PM   #2
Michael Hoaster
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Join Date: Feb 2004
Location: Boulder, CO
Posts: 5,182
I'm no chemist, but I believe GFO and/or other filtration media have aluminum in their ingredients. If you do run a medium with aluminum/cadmium, try taking it offline for awhile. Macro algae are effective at soaking up metals, so you might consider adding some to get those numbers down.

As many naturalists and environmentalists have suggested, we should set aside our arrogance,
our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey

Current Tank Info: 180g Seagrass Sandbar Lagoon, START DATE November 28, 2018
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