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Metal nuts in the tank
While replacing a fan, I managed to drop two #6 nuts into the tank.
This tank is full of plants, 2 feet deep, and has a sand and fine
soil substrate. The nuts are gone. I'll never find them.
These were regular hardware item bright finish nuts, probably some
kind of steel with a zinc coating. How worried should I be about
metal toxicity? Is there anything I can add to the tank to make it
To make matters worse, in a few days I am leaving for a week and a
half, so if things go south there won't be anybody to take emergency
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