ok what yall think of this instead, im gonna have a new 45 breeder tank, what would be the difference of having a cpr aquafuge instead of drilling holes in my tank to have a sump under my main tank, just wanna know if there's a major difference, my 37cube tank is doing very good without a refuguim right now, i only have an emporer400 and a cpr bakpak2r installed!! just dont want to waste money on stuff ill end up selling, so give me your thoughts on this, should i do a hangon refuge or undertank fuge, thanks all for the help!!!