Not that good. Put in a larger bucket of light green water,never clear up. Put it in a larger tank of clean water,keep clean about 3weeks...not worth the money
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Vanessa · August 24, 2026
One came broken to pieces. Very cheaply made plastic that hasnt done anything to my waterf tanks.
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Deanna · August 9, 2026
The cubes cleared the water but they broke into pieces the second weekend.