yes try the repotting as has been suggested, add some aquarium
charcoal in the bottom this will help keep the water fresher.
also as has been said it is not "bamboo" in any shape or form, and a
plant that normally survives in soil, being kept as a water culture
feature inside is at all sorts of disadvantages.
also another issues could be your humidity in the house may be too
dry, so aprt from giving it a misting say every couple of weeks
through the growing season with a liquid fertiliser mixed at about 1/4
recommended rate, you my have to increase humidity and one way is to
mist spray the plant at least once a day and more if needed, or the
bathroom may be better suited?
air conditioners and central heating also affect indoor plants.
and whilst direct sunlight is not desired they still need good alround
light for the health of the plant.
try repotting and then do you have a spot outside in good light and
away from direct sun and protected from winds where you can let it
With peace and brightest of blessings,
len & bev
"Be Content With What You Have And
May You Find Serenity and Tranquillity In
A World That You May Not Understand."