CPR Backpack style skimmers... noisy...?

[flipteg]

my father has one of those CPR style Backpack skimmer on his tank that he got on eBay for $50... the skimmer is fine and it doubles as a hang on refugium... the only problem is the pump is constatnly making a noise just like the regular CPR... the noise completely disappears when i shut off the air intake valve which tells me that the noise is being caused by the bubbles... the noise is fine for a tank located in the dinning room but it is too noisy for a bedroom... the pump for his skimmer is on of those Maxi Jet style pumps with the air intake located at the same intake where the water enters...

i have an AquaMedic skimmer which is also a hang on skimmer... it is using an Ocean Runner 2000 pump and it is virtually silent... none of that bubbling noise that the CPR style skimmer makes... i was just wondering if the bubbling noise is caused by the different pumps or is it caused by the skimmer's internal design...?right now, i am in need of a refugium to cultivate chaeto but my tank is not drilled... i'm trying to stay away from external overflow if at all possible... what i am thinking of doing is hooking up my Ocean Runner pump to the CPR style skimmer... but i just want to make sure that it is the pump that is making the noise and not the skimmer design...

 

[darkcirca]

I had a CPR and it started getting pretty noisy, had to clean out the intake air part and it worked fine again. But then again mine was when they came with the Rio 600 pump.

 

[flipteg]

so do you think if i replaced the pump with an Ocean Runner, the CPR will be silent...?

 

[RichConley]

Its the maxijet cavitating.

 

[Lagger]

The ocean runner will probably have too much flow & out microbubbles back in your tank.

Just extend the airline tubing a bit. Should help, but still noisy.

 

[Percula9]

I have one and it's noisy no doubt. I recently took off the RIO pump and replaced it wth a maxijet 1200 pump. I don't like its venturi very much, so I built a new one for it. Much improvement over the old one. Makes more noise but increased skimmer output by quite a bit. If you want a skimmer that makes less noise purchase a Remora that hangs on. Good skimmer I'm told, better then a Back Pack. A proper hang on refugium can be purchased from CPR. Looks good in the pictures and I've seen it actually work.