Suitable for the Rio 300 & Vision 260/250
The active carbon sponge cleans the water of all chemical impurities by absorbing them in its active carbon. Consequently, these chemical impurities will not affect the bacteria cultures inside the blue sponges.
If the carbon sponge is left in the filter too long, it can release the chemicals again into the water. Consequently, we recommend to replacing the carbon sponge every 4 weeks. Please observe the maintenance guidelines in your instruction manual for further details.
2 in each box.