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  1. #1
    Senior Member Rank = Sansai JimJones's Avatar
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    Should I narrow my return for a greater current

    Hello

    After finishing y pond i have noticed the unless i ramp up my superfish RC pump to around 15k I do not gt much of a current in the pond.

    My pipework is 2 inch all the way from the pump to the 2 inch gasket i got that is screwed onto the boxweld.

    I did it this way to maximise flow and friction.

    Im thinking is it because the return is slightly too wide I have to add more power.

    This is a cncern as tomorrow i install a draco drum and I will not be able to run 15k flow through it i will have to come down to around 13.

    Just wanted to ask everyone as once i solvent weld in that reducer I am committed tot the cause.

    thanks

    Jim



  2. #2

    Should I narrow my return for a greater current

    Perhaps look at fitting a Venturi on your return, this will, up the pressure @ the Venturi , so giving you aireated water & a better flow without changing anything. If you are DIY competent, you could make your own
    Good luck!


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    Last edited by silver.wolf.9883; 18-07-2019 at 11:57 AM.

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  4. #3
    Senior Member Rank = Mature Champion 14crazychris's Avatar
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    Quote Originally Posted by silver.wolf.9883 View Post
    Perhaps look at fitting a Venturi on your return, this will, up the pressure @ the Venturi , so giving you aireated water a better flow without changing anything. If you are DIY competent, you could make your own
    Good luck!


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    I added a Venturi to my pond, not only did it add lots of air but really helped with pushing the water around.


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  6. #4
    Senior Member Rank = Sansai JimJones's Avatar
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    thanks for the replies but O2 isnt really my problem . just flow and current as I have only one return into the pond. Been thinking about doing a split but I am confident that given the right solution on the one return all will be good thanks

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  8. #5
    Senior Member Rank = Grand Champion andikoi's Avatar
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    you may think your not getting much flow but you probably are,have you stuck your hand in front of exit to see what its like,you are always better with a couple of returns though not just one,preferably each end of pond on opposing sides of end walls,could you not put your skimmer return (if you have a skimmer) on other end to help return flow,,,andi

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  10. #6
    Senior Member Rank = Sansai JimJones's Avatar
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    hi andi

    yea i have the simmer and now that its fired up to 15k its helping along,

    didnt have the option due to unique circumstances in the build to do two returns but possible could one day.

    there are no dead spots in the pond everything gets moved around even from the corners so perhaps i might just let the system fully establish and see how things are in the coming months.

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  12. #7
    Extreme Koi Member Rank = Rokusai Rog.G's Avatar
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    Surely a reducer would be madness, all that would do is restrict the flow of water.

  13. #8
    Senior Member Rank = Mature Champion RS2OOO's Avatar
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    I have read two threads on here complaining about poor flow from Superfish eco RC pumps.

    You didn't mention if yours is the eco model.

    One of them sent it back and replaced it with an identical spec Jebao and his flow was significantly greater. He posted a couple of videos demonstrating, it's hard to gauge flow on a video of someone elses pond, but you could see the replacement jebao had a much greater flow at the same setting.

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    Senior Member Rank = Mature Champion RS2OOO's Avatar
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    As others have said, flow can be deceiving.

    You could attach a pipe to the pond inlet and let it flow into a bucket and time it.

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  17. #10
    Senior Member Rank = Sansai JimJones's Avatar
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    Hello

    Decided not to got with it as I have seen yes there is a good current going round the pond . just need to knock back the air in my spindrifter and turned up the skimmer pump a bit.

    I think i was just not used to a 2 inch return way below the waterline as most of my last pond was built by a right so and so and its funny how in a way i have got used to the bad installation .

    Time to rewire my brain as i hope im now doing things the correct way.

    All is well now i hope

    Jim

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  19. #11
    Senior Member Rank = Grand Champion andikoi's Avatar
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    glad your sorted,the trick i forgot to mention was milk,if you drop a cupful of milk where return is you can watch it flow,also good for finding holes in a pond,,,,andi

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  21. #12
    Milk & koi donít do well!
    I had collegue who ran a koi outlet, & someone overnight tipped a bottle of milk into six vats, the result in the morning was ALL DEAD!, he explained that the milk coated the gills & stopped them exchanging ammonia etc.... Iím no expert but that is not just a story (folk law, wives tale) it was true as I helped clean out the tanks the next day.


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  22. #13
    Senior Member Rank = Sansai JimJones's Avatar
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    not doing the milk thing dont worry

    but thank you for posting that

    Jim

  23. #14
    Extreme Koi Member Rank = Rokusai Rog.G's Avatar
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    I checked my return flow by tying a long piece of white wool to a stick and holding in front of the return.
    Not exactly high tech but gives you some idea of the flow.

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  25. #15
    Extreme Koi Member Rank = Jussai bowsaw's Avatar
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    Quote Originally Posted by silver.wolf.9883 View Post
    Milk & koi don’t do well!
    I had collegue who ran a koi outlet, & someone overnight tipped a bottle of milk into six vats, the result in the morning was ALL DEAD!, he explained that the milk coated the gills & stopped them exchanging ammonia etc.... I’m no expert but that is not just a story (folk law, wives tale) it was true as I helped clean out the tanks the next day.


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    milk has a higher oxygen demand than raw sewage, so could have tipped a pond running on the edge over the limit
    the slow pond build thread

 

 

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