I bought the TS24 Stream Kit that push 3100 GPH
each or 6200 GPH
. In my 137 gallon tank it moves a lot of water. They are awesome!! Very quiet! With the programmer you can create different current patterns that mimic the ocean. You have a night time pattern that slows down when the lights go off. You also have a feeding button that turns them off for 10 minutes while the fish eat.
Very expensive but if you can afford them go for it! I think they are the BEST out there right now!
P.S. Where on E-Bay was the guy that builds rocks for them. It would be cool to hide them.