Although similar looking, and both have the "water at left" 氵 radical...
Yuyu (湯々)
湯 meaning: hot water
Unique radicals:
日 - sun
勿 - not
Gatagata (潟々)
潟 meaning: lagoon
Unique radicals:
臼 - mortar
勹 - wrapping
灬 - fire
That these two Kanji look similar is why Jobko attends Gatagata and not Yuyu, since she's from America and she wrote down the wrong kanji when applying for schools.
