What to do about yellow leaves on hydroponic lucky bamboo? Drop in 2 rusty iron nails and it turns green again

Generally speaking, hydroponic lucky bamboo is very easy to grow. Some plant lovers keep their lucky bamboo in a vase soaked in water, and it easily lives for 1 year without any problem. Think about it, a bunch of lucky bamboo for 10 yuan is quite a good deal.
Hydroponic lucky bamboo really tends to get yellow leaves before it has rooted, but once it has rooted, it basically rarely gets yellow leaves. If you have already sorted out the light, water quality and other issues, and kept it far away from TVs and other electrical appliances, yet the rooted lucky bamboo still keeps getting yellow leaves, then you need to consider whether it is lacking the element iron.
Maybe you can try this little trick: try dropping 2 "rusty little iron nails" into the water!
What is the effect of putting rusty iron nails in?
The main component of iron nails is iron, and the element iron is one of the indispensable trace elements for plant growth. The rust on rusty iron nails can slowly release iron ions in water, supplementing the element iron for hydroponic plants and preventing yellow leaves, and it is especially effective for lucky bamboo.
Notes:
After discovering yellow leaves on lucky bamboo, you must first cut off the yellow leaves. If you want to use iron nails, they must be rusty iron nails; intact iron nails are very hard to oxidize in water and can hardly release the element iron, so for hydroponic lucky bamboo they have no effect.
Of course, the effect of putting rusty iron nails into the vase comes out slowly. If you feel you cannot wait, you can go to a flower shop and buy some special nutrient elements.