I just got my new 150 gal 72 x 18 x 29. I'm moving my 30 gal into it. Fish / LR / corals / inverts. I have a 300 gal water tank in the basement for volume. I have a 30 and a 10 gal glass tank at my disposal. I don't really want to fill the tank with LR because I like the open look. I don't want a DSB in the display tank also for looks (a couple of inches I think would look good but not 4 to 6). If I use the 30 for a fuge with a DSB would that be a large enough footprint 30 x 12 of DSB to control the nitrates? Do I need to stick some more LR in the 300gal plastic tank? Also, the overflows in my tank will be maxed at a rate of 8 turn overs, should I supplement? Do any of the nitrate reductors work? How long do those deniballs last? A viable option? I love this site, thanks for all the info!