I have only had them get stuck in the powerheads not Korelias, but can't say a determined seahare won't get inside. My previous seahare would actually clean the outside of my Korelia without getting stuck, but the powerhead just sucked it in. I think it has to do with the fact that powerheads are sucking through such a small intake, whereas the Korelias suck in from all sides of it.
As for powerheads being high up on the walls, the seahares go pretty much everywhere, so they will go there eventually..
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Rebuilding....
Concept Custom 50gal 24x24x20, herbie overflow, Radion g2, 20 gal sump, Bubble Magus NAC 7, MP10 WES, Speedwave 1320 return.
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