Exo Terra Moss Ball
Manufacturer: Exo Terra
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Naturally keep unsightly algae out of your terrarium with the Exo Terra Moss Ball! Removes phosphates, nitrites and nitrates which help algae thrive. Each ball treats up to a 20 gallon tank.
Place Exo Terra Moss Ball in the water part of a terrarium/aqua-terrarium. Depending on water volume, replace with new Exo Terra Moss Ball every two months for maximum effectiveness.