Originally Posted by BlueRam
As I was trying to build a Wasser-Mattenfilter when I ran out of time and tossed the powerhead in upside down with a sponge.
Hehe... imagine that
After fooling around with the Mattenfilter I now concluded that this is a better solution.
Of course, an internal filter with a sponge is nothing really new... it's just that sometimes we forget that "simple is beautiful".