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  1. #1

    Air pump... have I gone a bit overboard on the flow rate?!

    Pond is somewhere around 16000litres and I've got two bottom drains fed by a 130lpm pump. I've only just filled the pond and switched on the air... it turns the pond into a boiling cauldron and I can't see a thing in the pond. Perhaps I need something a little smaller!

    I'd be interested to know what size pump people are using, particularly if they have similarly sized ponds. I'm more than happy to replace the pump... I've tried to find a variable speed air pump, but without any luck.



  2. #2
    Senior Member Rank = Mature Champion andikoi's Avatar
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    ive got 23000l/5000g with 2 spindrifters and have both hooked upto 1 hiblow 40,i do have a jeboa pa100 running into my nexus,what filters have you got running,could you not pipe some of the air into that,you can get the splitters and taps that they use on nexus if your using bigger pipe,thats how i do mine as one pipe run to a bd is shorter so had to balance flow a bit,andi

  3. #3
    Thanks Andi.

    Anoxic filter, so nothing to take the air to other than the pond itself.

    If you're using a 40lpm with a 50% larger pond, I suspect 130lpm is indeed slight overkill Think I'll pick up a 30-40lpm and see how that goes!

  4. #4
    Senior Member Rank = Mature Champion andikoi's Avatar
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    can it not be piped into anoxic,is that your only filtration??,how deep is the pond?? i will say if your going for a smaller pump i advise get a good quality one,my jeboa surprised me and would have no qualms buying another,but other cheap pumps wont pump aswel as a hiblow does,andi

  5. #5
    I could take air to the anoxic... it currently has a seperate (very cheap/crap) air pump, but I was planning to ditch that as I didn't think it was necessary. The Hiblow doesn't seem to be too expensive, but the Jebao pumps seem good value... might give one of those a go.

    Edit... and pond is about 1.2m-ish deep.

  6. #6
    Moderator Rank = Grand Champion Feline's Avatar
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    I've got a 60 lpm Hailea ACO pump feeding both BD air domes (JBR plastics ones with the Jaeger diffusers on top).
    That gives me more than enough air, and I even bleed a little off to reduce it slightly.
    Pond depth is 6 foot.

    Not all air pumps with the same flow rating are equal when it comes to performing at depth. The Hailea ACO ones seem to be particularly good at this in my hands- I've even run both my BDs off my 35 lpm one. The flow was OK, but very slightly underpowered so I stuck the 60 one on instead.

    My pumps are the ones on this page Coastal Koi - Hailea Diaphragm - Secure Online Shopping
    Last edited by Feline; 03-12-2018 at 04:22 PM.

  7. #7
    Cheers Feline.

    I've just ordered a Jebao 45lpm. That should be a little calmer...

  8. #8
    Took a video of the pond with the two BDs on... am I right in thinking this is unnecessarily vigorous?

    https://www.youtube.com/watch?v=a-omAY87yWg

    Not sure if this will work...


  9. #9
    Extreme Koi Member Rank = Gosai davec's Avatar
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    Air pump... have I gone a bit overboard on the flow rate?!

    Quote Originally Posted by fatgus View Post
    Took a video of the pond with the two BDs on... am I right in thinking this is unnecessarily vigorous?

    https://www.youtube.com/watch?v=a-omAY87yWg

    Not sure if this will work...

    They ainít bad in my opinion Iíve secoh jdk 60 on my bottom drain ponds just under 4000 gallons 6 feet deep and Iíve a little more turbulence than you have and by the looks of it from your vid uv got more air going to one dome than the other thatís why I think your getting large bubbles on one of the domes


    Sent from my iPhone using Tapatalk

  10. #10
    You're right... there's more air coming from one than the other. I haven't bothered trying to balance them yet. I'll switch to the new pump when it arrives then if that's OK will balance then.

    Eventually I'll probably put the BD on a timer, so it's on all day/night expect for a short period that coincides with me getting home and checking 'the boys' are OK I'd like to be able to see them and the air currently makes it impossible

 

 

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