I recently set up my breeding tank for my albino bristlenose plecos. I went with a sponge filter but it seems the plecos have been sucking on it. Does this pose a problem?
Same here, it is one of the reason for having a sponge filter. I keep a spare one in the tanks at work (just for microscopy practicals), the "gunge" you get from squeezing them as the most amazing variety of stuff in it, particularly rotifers. <http://www.cichlid-forum.com/articles/rotifers.php>.