Tunze powerheads

[GiantBen]

Hey all. Got a couple 6025s for my tank recently. They are not totally silent, and the humming noise kinda bugs me. Anyone know if this is standard for these, or if these ones are just past there prime. I got them used, so that is always a risk. I'm comparing them to my Koralia Evo 425s, which make virtually no noise.

 

[northbay-reefer]

They should be very quiet, if they are old you probably need new impellers for them.

 

[GiantBen]

Thanks Tom. The guy said they were about a year and a half old. I think these are the "new" ones which don't have a removable impeller, but I'm not all that up on Tunze technology.