forget about magdrives and look only at the pressure rated pumps. like the MAK 4 and others.
a tunze would be nice in there but I would also have some stratigicly placed powerheads to mix up the flow. If you are looking at wave makers the red sea is a nice one.
for return current I wouldent worry to much about loc line and the such, it gets salt creep and you are always cleaning it. I would just use PVC and set it up with some thought.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
Some strive to be perfect.... I just strive.
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