Elemental Sponge is a Gene Tonic in BioShock 2. It restores a small amount of EVE whenever health is lost due to elemental damage. If the player has Electric Flesh equipped, then they will not gain EVE when hit with electric attacks.
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Minerva's Den[]
Found on a fan grate in the East wing of Climate Control in Operations. Can be seen through a glass window from the main path. Unobtainable in Gatherer's Garden.