TommyP
Aquarium Advice Addict
Ordered it anyway just waiting for it to come in the mail. It's 4" diameter. Rather long for the sump tank even if I do out the 20l down there. I think it was 17 inches or so ...
If you don't use a filter sock, you are going to get a buildup on the bottom of the sump. if you can vacuum it out every once in a while with no trouble, then you don't need the filter sock. I would rather change socks than do this. Plus, one of my sumps is on the floor and impossible to start a gravity siphon for. I would need to use a pump to suck up the detritus.