WOW thats alot of replacing filters is gonna cost ya.. Wait what am I talking about? my frag tank will be done soon too and Ill be right with ya.:doh:Barbara;205639 wrote: I was evaporating 1-2G a day when I just had the 90 + 29G sump. Once I plumbed the 20G frag tank into the system, with it's own separate Mag 5 return, now I'm up to 3-3.5G a day.