Reply To: Java Moss – will it clog filter? Welcome to the website! › Forums › General › General Aquaria › Java Moss – will it clog filter? › Reply To: Java Moss – will it clog filter? June 2, 2007 at 7:05 pm #11304 AquaseafoamParticipant It has never been a problem for me- mine doesn’t seem to make it in the filter, but small bits that break off get trapped on the intake. This probably won’t happen in a CPD tank though- it happens with cichlids for me! Now, duckweed is another story