<a href=showthread.php?s=&postid=12201328#post12201328 target=_blank>Originally posted</a> by Reefski's
not that i am ready for this yet but i am trying to decide how to do the return/s from the sump.
i know i want a Calfo closed loop manifold. it keeps the pressure and flow equal amongst all the holes.
<a href="http://s93.photobucket.com/albums/l58/reefski/?action=view¤t=calfoclm.jpg" target="_blank"><img src="http://i93.photobucket.com/albums/l58/reefski/calfoclm.jpg" border="0" alt="Photobucket"></a>
how many holes though? the return pumps i have are a hammerhead about 5,800 gph and a Dart, about 2,800 gph.
right now i am thinking at least one in each corner and ??
i also have penductors that can go in the retuns to increase the flow. i wonder if that might be to strong aiming at the corals. they only have 3/4" outflows and if i dont use them i could keep the pipe 1 1/2" to match the pump outflow. i know if i use several of the penductors i wont be diminishing the return flow.
i will have to calculate that out.
i also want some redundancy built in in case one pump fails.
Carl