Ok so i got a 46gal bow front and im adding a 20 gal sump. I need help figuering out the pump return and overflow box. I already have a aqua clear 110 pump $FREEBEE$ I did find out its rated at 900gph and im looking for the right over flow box thats gunna handle that. The only ones iv found are 800gph and 1200gph. Im afraid the 800 wolnt keep up and the 1200 might be loud stopping and starting to siphon all the time. Or should i do somthing els? Any imput will be helpfull i have a half a$$ idea of what im doing. And another thing When i do water changes i stir up alot of crap in the tank and i want that to go to the sump to filter. Any input on what i can do for that? all these overflow boxes have lil pre filters and sponges that wolnt let that pass threw.