When using this technique a member of the Watatsumi Clan will use their special chakra to detect, expel, and destroy any and all foreign substances from water or a form of water to turn the water into all natural and untempered with water or form of water, which they can control to their every whim. Whether it be senjutsu chakra, natural energy, dark chakra, chakra, or any other possibility. If it is in water or a form of water a user can of this technique can get rid of it. Users are even able to erase foreign substances that are completely new to them. For shinobi capable of absorbing water and converting it into chakra this means they can absorb any and all types of water no matter what it is in it because they can simply use this technique to erase from the water what would be harmful