1. Brown algae on the tank wall can be easily wiped off with a soft cloth. If it is algae on the leaves, you can wipe it off with your fingers. If it is a bare tank, you can also use chemicals containing algae removal ingredients to completely remove algae after isolating fish and shrimp.

2. Keeping some fish that eat algae in the fish tank can also remove algae, such as elves and moss-cleaning rats. They can eat algae growing in the fish tank, so they are called cleaners in the fish tank.

3. Besides fish, tool shrimp and tool snail are also good choices for algae removal in fish tanks, such as Macrobrachium macrobrachium, giant salamander, cherry shrimp, zebra snail, abalone snail and cap snail. They also have a good effect in cleaning brown algae and green algae.