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PostPosted: Jun 26th, '14, 09:04 
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I have someone willing to give me a large amount of IBC containers and deliver them for free. Catch is that only some are food grade. Some held a 19% copper solution.
Has anyone ever cleaned copper or other heavy metal out of an IBC?
help! I am ready to get beyond my little pond and trough at about 300 gallons and on to bigger things


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PostPosted: Jun 26th, '14, 11:10 
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Personally I wouldn't risk it. I'd imagine it still leeching out of the plastic for some time after despite masses of scrubbing. Copper kills fish quite easily.

How many are we talking about? Can you just dispose of the non food grade ones?

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PostPosted: Jun 26th, '14, 17:59 
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Thanks for the advice and the welcome. I was afraid that was going to be the answer. I know I have used copper in small amounts to control parasites ind even algae in aquarium (decorative only) fish in the pet industry with no harmful effects if you treat with caution. My problem is that it never got into the glass like it might a plastic.
As for how many food grade ones are available im not sure yet. Just made the deal yesterday. They are a small producer of a fungicide for agriculture here in the southeast U.S.. I know the blue copper is a main active ingredient in their product. The others held mollases...not sure how that comes in to play.


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PostPosted: Jun 26th, '14, 19:40 
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Molasses will be fine, it's just sugar. If you could get the whole frame and bladder, you might be able to get cheaper bladders to use inside the metal frames?

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PostPosted: Jun 26th, '14, 22:01 
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Copper is actually an essential plant micro-nutrient - but in small doses. Something like 0.75g in an entire IBC would be appropriate for tomato growing needs if you were doing hydroponics. That's not to encourage anyone to add copper - just saying that the amount of copper absorbed by the HDPE plastic should be well below worrisome levels.

To clean those containers, I would put vinegar or another acid in there and roll it around. If the liquid comes out blue, rinse and repeat. That should remove any easily soluble left over copper.

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