I am starting my first tank soon and am gradually piecing together all the supplies and equipment I will need. I am a chef and have access to a steady supply of 5 gallon pickle buckets that seem to me they would make great buckets for water changes, substrate rinsing, etc. The thing is that despite hand washing as well as washing in a high temperature industrial dish washer I can't seem to get rid of the smell of pickles. The smell itself isn't that big of a concern to me as it is only noticeable when the buckets are empty and u stick your face near them. My concern is that if I can smell it that maybe some of the vinegar could leech into any water I put in there. Is this possible or are they safe? If they aren't safe than how can I make them safe? Thanks, -Kevin