Jeff wrote: > the overflow boxes with this filter? Is this a good choice of filter? Can > someone explain the theory behind overflow boxes, sumps etc. or can send me > to a site with good info. My site has a simple explaination and diagram of how an overflow box works. http://www.csd.net/~cgadd/aqua/overflow.htm http://www.csd.net/~cgadd/aqua/wetdry.htm -- Chuck Gadd