What is growing on this rock?? : r/PlantedTank

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Election-of-1952
1952-Electoral-Map
I-Like-Ike
United-States-Presidential-Primary
1952-President
Eisenhower-1952
1952-Campaign-Posters
1952-US-Election
1952-Electoral-College-Map
1896-United-States-Presidential-Election
1864-United-States-Presidential-Election
Adlai-Stevenson-I
U.S.-Presidential-Election
Dwight-D.-Eisenhower-1952
Who-Was-President-in-1952
1796-United-States-Presidential-Election