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Kelp Grow is a spray that played a major role in the episode "Giant Squidward." SpongeBob and Patrick use it to do good deeds. Kelp Grow helps any type of kelp to develop in seconds. The company of Kelp Grow makes products used to help plants develop faster, like soil.
The bottle is yellow with a light green burst effect. In blue capitalized letters are the words "Kelp Grow." The bottle has a white top.
It is used to revive withered kelp. If it is sprayed on anything else, it makes that bigger. SpongeBob and Patrick thought that if the bottle is turned upside-down it will shrink things, but they were wrong.