Because goldfish can eat.
If you want to play.
Most of them put Ceratophyllum.
It is recommended to use the moss triangle (it looks good when tied to the sink wood and stone), the banyan tree (planted on the bottom of the water or fixed on the sink wood as the foreground grass), the iron crown series (used as the middle and background grass to create a "forest feeling"), the mini crown (the smallest crown can be used as the foreground grass), and the antler moss can be raised in good light, which is very beautiful.
The above aquatic plants are the best and most common aquatic plants, and they are also very beautiful. They are all commonly used aquatic plants in aquatic plant landscaping competitions.
To put it more simply, you go directly to the aquarium market and ask the boss what is the best grass in his shop, and then you can choose the best one.