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OK, on further reading I stand slightly corrected in that it seems the cadmium in galvanized coatings is more problematic than the zinc.
My main point stands, however. Both move from galvanized coatings into water when the pH is low, e.g. if you have naturally very acidic water or (as being discussed) if you use something real acidic in a galvanized waterer. Cadmium concentrations in water (also zinc, etcetera) can reach toxic concentrations this way (people have been poisoned, albeit nonfatally, by lemonade stored overnight in a galvanized container. Hence the perpetual warnings in animal science literature not to use acid additives (ACV, copper sulfate, etc) in combination with galvanized waterers.
I don't think anyone said rust was harmful in a nutritional sense -- however serious rusty areas can be sharp enough to cut.
Pat
good post,since ACV is good for your birds and copper sulfates are in many medications,I guess more reason to stay away from metal waterers. Will
OK, on further reading I stand slightly corrected in that it seems the cadmium in galvanized coatings is more problematic than the zinc.
My main point stands, however. Both move from galvanized coatings into water when the pH is low, e.g. if you have naturally very acidic water or (as being discussed) if you use something real acidic in a galvanized waterer. Cadmium concentrations in water (also zinc, etcetera) can reach toxic concentrations this way (people have been poisoned, albeit nonfatally, by lemonade stored overnight in a galvanized container. Hence the perpetual warnings in animal science literature not to use acid additives (ACV, copper sulfate, etc) in combination with galvanized waterers.
I don't think anyone said rust was harmful in a nutritional sense -- however serious rusty areas can be sharp enough to cut.
Pat
good post,since ACV is good for your birds and copper sulfates are in many medications,I guess more reason to stay away from metal waterers. Will