increase filtration prior to housing any eels?
<< I'm thinking you are good. But the live rock is the best type of filtration, so I recommend having plenty of high quality live rock. >> Question about noise and stress on the animals. The 2-2″ overflows, even with plastic gutter screen material to break up the whirlpool effect still make noise. Is the bothersome to the animals? << No, with all the other stresses of our tanks I can't imagine this any type of impact. >> If so what can I do to reduce the noise without reducing the flow? Question about oxygen levels. With the amount of water turn over and protein skimmer will I have to add any other means of adding oxygen to the water? << Depends on how many and how big of fish you have. I'm going to say no for now. >> I am worried about the animals and bacteria competing for the dissolved oxygen.