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Submitted by: Derek

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Great help thanks.I am thinking of trying the plastic water containers we use for our home water supply and I shall check this but assume given their original use it will be ok.

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Submitted by: Larry

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Plastic containers do leach toxins mostly when subjected to high temperatures so it is a concern. The most recent toxin from plastic of which I am aware is bisphenol, a chemical that binds to the same receptors in the human brain as estrogen, a female hormone. Bisphenol has been linked to breast cancer... America grades their plastic by number for recycling and reveals what the plastic is made of - maybe other countries do this too and I have not heard. #1 plastic is extremely light and seen in water botles or coke bottles. This plastic does leach toxins... #2 plastic is of a heavier grade and can be seen in milk jugs, bleach containers and those 'heavier' plastic containers. They have not been found to leach toxins as long as they do not come into contact with hot liquid. #3 plastic is some kind of PVC product and over time they release a harmful gas into the air. #4 plastic can be found in squeezable plastic bottles and food containers such as Tupperware. Supposedly they are the safest to use and do not leach any toxins. #5 plastic is found in ketchup bottles, yogurt containers, etc and also can be reused without leaching. #6 plastic is found in disposable plates, aspirin bottles and CD cases and is extremely toxic over time. #7 plastic such as sport water bottles, baby bottles and 5 gallon water bottles should be used once... So whatever plastic you use, Tupperware products and similar food storage containers are probably the safest. In fact whatever you do use for a nutrient container will leach something into the water unless you use glass or ceramic... The above info on plastics can be found <a href="http://suchismitamajumder.wordpress.com/2009/06/15/how-plastic-grading-works/" target="_blank">here</a>.

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