peristaltic pod transport

[Delphinus]

Yes. An airlift or an Archimedes screw type pump would have the least shearing effect.

That said ... copepods aren't realy going to be chopped into little bits by pumps and powerheads. Our perspectives on this are skewed a little. If I take my finger and jam it into the impeller of a running pump I can expect it to hurt because, comparatively, my finger is this big immobile object that is going to be hit repeatedly by the blades of the turning impeller.

A copepod on the other hand is tiny. The body will get sucked in and immediately shot out by the centrifugal forces and probably doesn't even ride through the impeller blades for a a complete turn of the impeller. Likely there will be the occasional unlucky one but most of the times they just get shot out a litte dazed and or dizzy but not really dead.

[cale262]

I imagine allot of them find themselves taking a ride through the return pump ending up in the DT, I know from time to time I've found them in my skimmer cup when I'm dumping the content into the sink and rinsing it down the drain...

[claymax]

damn this internet machine, it read articles claiming that 80% of pods passing through return pump impellers get killed, i'll take your guy's words over the random reef article anyday

[phi delt reefer]

lol 80% - ask that fool to show his manual count of the pods. Fish dont care if the pods are whole or halfed.

Pods = yummy in any form.

Bacon of the sea

[The Grizz]

Originally Posted by Delphinus

Yes. An airlift or an Archimedes screw type pump would have the least shearing effect.

That said ... copepods aren't realy going to be chopped into little bits by pumps and powerheads. Our perspectives on this are skewed a little. If I take my finger and jam it into the impeller of a running pump I can expect it to hurt because, comparatively, my finger is this big immobile object that is going to be hit repeatedly by the blades of the turning impeller.

A copepod on the other hand is tiny. The body will get sucked in and immediately shot out by the centrifugal forces and probably doesn't even ride through the impeller blades for a a complete turn of the impeller. Likely there will be the occasional unlucky one but most of the times they just get shot out a litte dazed and or dizzy but not really dead.

I would have to agree here with Tony, I had zero pods in my DT and lots in my sump. Then I started noticing them every where in my DT. So that would tall me they made it threw the return pump and are now a nice little snack for my Manderin.

[claymax]

is it ever necessary to go out and buy pods or is it pretty well standard to just let em come in with live rock and multiply on their own

[The Grizz]

Originally Posted by claymax

is it ever necessary to go out and buy pods or is it pretty well standard to just let em come in with live rock and multiply on their own

I have never bought any them seem to have come in on some of my LR and probably a few corals too.