Quote from this link: http://www.bamboo4luck.com/care.php Q: What do I do when the leaves or stems turn yellow? A: If the leaves turn yellow, pluck the yellow ones off or it will affect the rest of the plant. Then take out the bamboo arrangement out of the container and rinse the rocks, the container, and the roots of the bamboo and put everything back together, then add fresh water with a few drops of Green Green plant food. If the stems turn yellow, it is too late for that stalk. Please remove it and buy another stalk to replace it. On a more personal note, I found it a lot of trouble to keep the plants in water. It is easier to keep the plant in soil and just water regularly. My plant grew a lot and appears a lot healther than the ones in water only. There is a recipe in one of the links for the potting soil mix. I recall that I used moisture control potting soil and mixed it with orchid bark.

You need to leave it be for a while, it's been through a lot of changes, I agree with tropic, take some cutting and start all over, I think you may loose it after potting it directly into soil, check out the bamboo forum here http://forums.gardenweb.com/forums/luckybamboo

I don't even see a good section for you to cut and start a new one, if it were mine I would throw it away and buy a new one. My advice would be not to use vinegar and more, when I had one in water I only washed it with warm water and I'd wash the stones with warm soapy water and rinsed well.

What kind of water do you use? As its possible that there are high levels of contaminants in the water which can be bad for lucky bamboo and cause it to slowly decline over time.. However I have had my lucky bamboo lose a lower leaf or two due to not getting enough water as mine requires refilling every couple of days or it gets a little fussy.. Also you want tge roots to have room to grow and extend and keeping the stalks out of the humiditts inside of the jar is also a good idea.. You should fill the whole jar up to allow for more room for the roots to grow, and it would also allow for a bit of airflow to the roots. Hope this helps :)