Of course, for the Lucky bamboo kept in water, the only way to underwater is to allow the roots to be exposed to the air. In cases of underwatering, the solution is to begin watering regularly. Always make sure you have water inside your container. It is often difficult to overwater hydroponic plants because the roots have adapted to the water, but overwatering may still cause brown tips to appear on Lucky bamboo.
While brown tips can be a sign of excess salt buildup, if the brown tips are accompanied by yellow leaf edges, the most likely cause is excessively dry air or cold drafts. Instead of modifying your watering schedule, move the plant to a less drafty or dry spot. Yellowing or disfigured leaves can also be the result of problems with stagnant water. As mentioned above, changing the water, rinsing the roots and cleaning any stones or pebbles can help to reverse the impacts of stagnant water. You may also want to change to a darker container if you are having algae problems in a clear vase.