Sorry for the stupid question coming up but I know nothing about sump tanks and really keen to understand them further. Any one got some good reading tips?
1. Does a sump tank have to be connected to the war mains?
2. I'm about to set up a 180-200L tank, I don't think I need a sump so what would you recommend for a good HOB
filter? If at all I'd be happy buying a filter that would handle a tank twice the size.