Following Peters post about how dirty his filter was I popped mine out yesterday, after blowing out the dead flies from the reverse side it looked fine but a few moments in warm soapy water showed how much it had trapped, the water was black in seconds......a good soak then a dry in the sun and it's back in. Looking at it closer it's very similar to the aquarium filter medium I posted about last week and a sheet of that for about £10 would provide several filters.
