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How to see if the algae ball is dead? When the algae ball turns yellow, it means it is dead.
1, the living algae ball is generally green, if it is yellow, it means dead.

2. The algae ball is composed of filamentous green algae, which only exists in a few lakes in the northern hemisphere, directly from 1-30 cm. It can live in fresh water, has certain cold resistance, and is also very resistant to darkness. If put in the refrigerator, it will not die for several months, but it is very afraid of heat.