[irishc]

I've been tinkering with different bait tanks over the years and have had pretty good success... Here's a few things I have found that might help reguardless of what set up you have:

The key to keeping baits alive is to keep the water fresh & clean, and circulating. Ideally, you want to have enough water flowing into the tank to completly turn it over at least every 10 min. That said, go with an 1100 gal./hr pump instead of the 800 gal/hr pump. This may seem overkill but remeber the water presure and amount of water the pump is actually moving decreases over distance and the height it has to travel. Sounds like you allready have this one covered but make sure you're using an areator pump. The infusion of air into the water will also help keep the bait alive. Scoop out foam and if there is a lot of blood in the water drain it out quickly with a bucket and replace it with fresh. And like the other guys said, don't overstuff the tank and cull the dead ones out.