I was thinking of going with amiricle overflow I looked at the CPR and I don't like the fact that you have to use a little pump to keep it working right. As far as the baffles I was planning on 17" tall baffles that gives me roughly about 14 gallons of room to play with. Should I increase the return area or is it big enough as is at 6X12X17 5.29g I would like as big of a fuge as possible.