My lucky bamboo stalk is turning yellow
Hello, so today while checking on my lucky bamboo plants I noticed something weird (They're in a transparent glass vase), each one is ~60 cm long. I noticed that one of my plants' stalk from the bottom (where the roots are) started turning yellow it's like half of an inch is yellow, while the rest of the stalk is healthy green. Plus the roots have white stuff on it. (I don't use fertilisers)
Here are some of the lucky bamboo health caring tips that I use:
I always fill a bucket of tap water and let it rest for 24 hours before changing water.
I clean the vase and change the water weekly.
I have a a florecent lamp which I put the plants under during the night.