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Does anyone make a powerhead that DOES NOT blow bubbles?

Discussion in 'Freshwater Equipment, Products, & DIY' started by MikefromNH, Jan 25, 2005.

  1. MikefromNH

    MikefromNH AC Members

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    I have an AC 301 and an AC 50 (new 401) and both impellers cavitate:mad:. The 50, which I'm currently using, is the worst of the two, blowing poofs of bubbles every 15 seconds or so. It is totally submerged and nowhere near any source of bubbles. It doesn't really make the tank look bad but I feel, due to the cavitation, it's pulling dissolved oxygen out of the water and sending it to the surface as large bubbles. My fish seem fine but I still don't like the idea. I have $70 invested in these pieces of junk!:mad2

    Does anyone have any recommendations on non-cavitating powerheads? I'm using it for circulation and looking for around 250 gph flow rate. I also have a quick filter on there for a little extra water polishing.

    BTW, I tried both units without the quick filter with the same results. I also tried adjusting the flow rates to no avail.
     
  2. QCppg

    QCppg Carp for brains!

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    I have that same powerhead, and an old version of the 801 (I think it is anyways, it looks identical). Neither cavitates in FW or SW in my experiance.
     
  3. blitzen25bm

    blitzen25bm AC Members

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    supposedly not the best powerhead but my rio dosent blow any bubbles
     
  4. RTR

    RTR AC Members

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    I've never had any AC powerheads cavitate either, unless I restrict the intake. Are you?
     
  5. MikefromNH

    MikefromNH AC Members

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    At first I thought it was the restriction caused by the quick filter causing the cavitation. After removing it there was no difference. Running it with the flow lever at max actually makes it worse! To me, that dosen't make sense. I don't think this is an isolated problem either.


    This is from the FAQ on the Hagen website.
    ---------------------------------------------------------------------------

    Since I'm only using the powerhead for circulation I never put the airline on there to begin with. I figured if it's submerged what would it matter if there was a knotted airline on there. Maybe that's the problem though I can't see how it could be. Also, I removed the impellers and looked for any imperfections on the blades. There were a few tiny casting flaws that I cleaned up with an exacto knife but the problem is still there.
     
  6. QCppg

    QCppg Carp for brains!

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    Because of the way an impellar works it is doubtful that you are getting cavitation unless you have an ENORMOUS quantity of dissolved gas. Cavitation takes place in the low pressure zone behind a propellar blade at high RPMs. An impellar flings water rather than pushing it, and few household AC motors turn faster than 3,600 RPM, which is normally too slow for cavitation.
     
  7. daveedka

    daveedka Purple is the color of Royalty

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    I have never seen these bubbles with my penguin powerheads, but recently I bought a smaller aquarium systems powerhead, and do get occasional bubbles. I attributed it solely to pearling from the plants, but your post makes me curious. Either way with the plants, my tanks usually looks like a glass of soda so the bubbles aren't a big deal for me. You might try penguin, but I imagine the source of the bubbles will be the same for any powerhead, and therefore you won't see a difference.
    dave
     
  8. pl*co

    pl*co Feeds low on the food chain

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    My Penguin 1140 (300 GPH) Power Head does not blow bubbles unless I adjust the airline to do so. Otherwise, it creates a nice current in the tank. It's pretty quiet too.

    Would you like to have it? No charge. I never use it because my tanks aren't large enough for that much power. I bought it back when I was a newbie and didn't know any better. :( I recently tried it out (just to see) in a 30 gallon that I recently acquired and it knocked over a fully grown Convict when it swam too close. :p Would you believe I actually bought it for a 10 gallon originally? :laugh:
     
    #8 pl*co, Jan 30, 2005
    Last edited: Jan 30, 2005
  9. MikefromNH

    MikefromNH AC Members

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    Thanks, I may take you up on your offer. First, I'm going to contact Hagen to see what they say. Like a moron, I threw away the receipt from petsmart so I cant return it ($50 in the store!:mad: ). Hopefully Hagen will warranty/replace it or something. Does your Penguin accept any sort of quick filter?
     
  10. pl*co

    pl*co Feeds low on the food chain

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    #10 pl*co, Jan 30, 2005
    Last edited: Jan 30, 2005

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