New Koralia power heads are noisy!!!

[Shane and John]

I just got my shipment from Marine depot and got 3 Koralia power heads....I got em in the tank and one seems be very noisy..Will this stop after it is broken in ???Or did i get a defective one??These are stage 4 that pump 1200 gph in a 120 gallon tank....thanks for any input.....




Shane

 

[surf_buddy]

My Korilla 3's and nano are silent. If I were you I'd send it back.

 

[dailydriven911]

It seems like some are noisy and some are not. I have two and one is silent the other is somewhat noisy.

 

[mmkeeper]

Mine 3 is quiet. What type of shaft does it have? Metal or ceramic.

 

[Shane and John]

These have a metal shaft..It seems like it is starting to quiet down now ...Maybe just a break in period..