So I would like to add more bio capacity to my 125 gallon African tank (11 fish total ranging in size from 2-7") Currently I have a Penn Plax Cascade 1000 which has one bio media tray, and an HOT Magnum 250 (no bio). I have a 10 gallon tank laying around and I'm going to pick up a 40 Gal breeder and a 40 tall tank tonight for 50 bucks! I'm not looking for anything elaborate but want it nice looking. This will be my first DIY project, and I'll document it from start to finish. I'll need to build an overflow (tank is not drilled) need suggestions on a pump to return the water, and advice on the best bio media. I really don't know where to start and have been googling crap for 3 days now and still don't know how I want to proceed. So bounce some ideas off me and lets get this project rolling! Thanks in advance!