Replacement set consisting of:
 2  x Coarse/Blue 
 1  x Fine/Red 

 Filter sponges from OJ FIlters
 The filter sponges have a perfect fit that will perfectly match the filter system for which the OJ sponges are intended.
 The coordination of the filtration density between the coarse and the fine filter sponge ensures the correct collection of floating dirt and the cultivation of bio-cultures to achieve optimal water management in combination with your filter system. In short, the solution for healthy water.
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 Replacing the filter sponges
 We recommend that you gradually replace the OJ filter sponges with a running filter. Bio-cultures are present in your current filter environment that ensure the quality of your water. A balanced transition is therefore desirable.