Posted: Wed May 16, 2007 6:49 pm
Internal filters, especially the ones made for smaller tanks, basically push the water around for circulation. I used a Fluval 2+ with hatchlings. I cleaned the filter weekly. The sponges (foam pads?) I rinsed in tank water and reused until they turned really brown (and had a discerable smell) and then replaced them.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-