because I bring the mac's up into brackish water, I need two systems, after the bait is caught ( and purged of chum) I switch from my raw water system to my secondary system before entering the river, this is also a great back up system in case of problems with weed chocked waters of pump failure..
35-60 GAL KEEP ALIVE RECIRCULATING KIT [Model 256] - $89.95 : LiveBaitLarry.com, Live Bait and Fishing Products
the two pictures show the two systems, the obvious, the incoming water from the 1100 gph mag drive pump below deck the other the 800gph shur flow bait saver... I've used alot of differantr systems dating back to the 70's when live bait was all I fished.. this one is the best and has worked flawlessly for years...