powerhead filters

[fishguyxd]

I have two maxijet 1200 and so I cut foam to put over the intake ends. reason being (to stop an anemone from challenging the impeller ) which does works, but the filters really do a job at getting any stray particles and get plugged up after a short time (the thing is my tank is not dirty) So any other filter type idea's for the powerheads that may work to stop a anemone from suicide missions??