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- Jan 9, 2017
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My tanks a 250 gallon and a 130 gallon which are both plumbed together to the same sump, have been running for about 20 months now. My last ICP test which was from March showed Zinc (19 µg/l) and Iron (2.197 µg/l) for the first time. Not finding a source for it, I thought that maybe when I was doing some work above the tank, that maybe I a dropped a screw into the 250 gallon. So I took a magnet and ran it though the sand to see if there was a screw hiding in the sand. I didn't find a screw, but I did find a number of metal pieces or flakes. They are not magnetic on their own but they do stick to a magnet. So I decided to run the magnet through the smaller 130 gallon and I did find some additional pieces, but not as many as what was in the 250 gallon. The Tropic Eden Reef Flakes were added to both tanks when I set them up and both tanks were setup at the same time and no additional sand has been added. I was wondering if anyone else who uses the Tropic Eden Reef Flakes has had a similar issue or not. If the metal flakes didn't come with the sand, then I'm not sure where it came from. In addition, would it have taken this long for the Zinc and Iron to show up. I do regular water changes via an AWC setup.