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  1. #1

    Energy Efficient Pumps

    I am new to this forum, I have kept koi for 20 years and have two ponds a circular 30,000 litre and a rectangular 50,000 litre. My energy costs are very high and would like to change the filtration and pumps for my 30,000 litre pond. It currently uses two Argonaut 14 which are each 500 watt pumps. The system is gravity fed going through two vortex’s and then through the two pumps into 2 Aquadyne filters. They have done a great job and my pond is crystal clear with some very large koi. I am thinking of replacing the Aquadynes with a gravity fed Oase drum filter similar to the system on my 50,000 litre pond. My question is what would be the best low energy pumps to use with the Oase gravity fed drum filter. My return pipe work is twin 1.5 inch pipes running for about 6 meters with 3 x 90degree bends in each pipe that return through tangential returns on pond wall. I can’t change this pipe work as it is embedded in concrete. I am looking for a pump or pumps that will meet the flow needs for this pond and use the minimum amount of energy.



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  3. #2
    Quote Originally Posted by Rmackint View Post
    I am new to this forum, I have kept koi for 20 years and have two ponds a circular 30,000 litre and a rectangular 50,000 litre. My energy costs are very high and would like to change the filtration and pumps for my 30,000 litre pond. It currently uses two Argonaut 14 which are each 500 watt pumps. The system is gravity fed going through two vortex’s and then through the two pumps into 2 Aquadyne filters. They have done a great job and my pond is crystal clear with some very large koi. I am thinking of replacing the Aquadynes with a gravity fed Oase drum filter similar to the system on my 50,000 litre pond. My question is what would be the best low energy pumps to use with the Oase gravity fed drum filter. My return pipe work is twin 1.5 inch pipes running for about 6 meters with 3 x 90degree bends in each pipe that return through tangential returns on pond wall. I can’t change this pipe work as it is embedded in concrete. I am looking for a pump or pumps that will meet the flow needs for this pond and use the minimum amount of energy.
    20000 varipump = 185 watts

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  5. #3
    Thank you, looks good. Does this pump need a 3-Phase electric supply?

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    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by Rmackint View Post
    Thank you, looks good. Does this pump need a 3-Phase electric supply?
    No they don't.

    There are 30,000 lph variable pumps that can run as low as 40w or up to around 345w (from memory) at full chat.... All on a normal plug with 5amp fuse!

    The power consumption tends not to be proportional to their flow rate so you may find it more efficient to be running 2 pumps at 50% rather than 1 pump at 100%.

    My 20,000 variable flows at 6500 lph using just 24 Watts.

    Sent from my Pixel 4a using Tapatalk

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    Senior Member Rank = Grand Champion samp09's Avatar
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    What pump is that Steve? That's mega economical! My Aquaforte Dm Vario runs about 80w at 60% which probably isn't far off 6000lpr at a guess.

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    Quote Originally Posted by samp09 View Post
    What pump is that Steve? That's mega economical! My Aquaforte Dm Vario runs about 80w at 60% which probably isn't far off 6000lpr at a guess.
    Be interested to know myself Sam,looked at the Ea ones which I think turn right down to 1%.
    Cant find anywhere that tells you the watts to % info.
    John

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    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by samp09 View Post
    What pump is that Steve? That's mega economical! My Aquaforte Dm Vario runs about 80w at 60% which probably isn't far off 6000lpr at a guess.
    Hi mate,
    Its the Jebao 20k TSP, I have it running my water fall at 30%, good flow and yep, just 24 Watts.

    But they seem to have replaced it with the 22k TSP which has a minimum wattage of 80w at lowest setting (I have one of these as well, wish I knew before buying).

    I believe my pump is still available, now branded as a Pondxpert, Smartin on here has 3 of them.

    Sent from my Pixel 4a using Tapatalk

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    Senior Member Rank = Grand Champion samp09's Avatar
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    Smartin sold his as they was the same with the 80w minimum I believe. Thanks mate, hope they haven't discontinued them as that's ideal!

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    Hi Steve, is 30 % the lowest setting ?
    John

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    Senior Member Rank = Mature Champion smartin's Avatar
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    Hi All,

    pondxpert 20k varios, i have 2 and a spare in the shed, 30% is the lowest setting but only uses 24 watts on my ASHP and pond return pipework or 28 watts on my shower as head height of 1.6m so still pretty good, if you go to pondxpert website you will see they declare power and flow rates for their pumps at lowest through to heighest which no other manufacturer does that i have seen, been in for a few months and working fine, i am using around 110 watts between both pumps set at 55% to 60% usage or 24k / 25k litres per hour flow combined..... so good turnover and good efficiency..... ensure you check the front plate of the pumps if you get any of these as i had 2 that had cracked front plates - apparently a shipment had a manufacturer defect, all were changed without quibble... i sold my new sine wave Jebao's TSP as these run at 80 watts at 30% so much for new technology !!!! and replaced with pondxpert.
    Last edited by smartin; 05-07-2022 at 09:56 AM.
    2200 gallons,infinity window,
    Evolve 4k combi,spindrifter,
    2x20k pumps, BD,Skimmer,
    Shower, ASHP

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    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Hey Smartin, just to say, my 4 year old TSP has a manufacturing stress mark on the front of the body in exactly the same place.

    So these Pondxpert pumps must be using the same casings.

    As you say, the 22K pumps of the same design seem to be far less efficient with a minimum 80w running power, albeit pushing out way more than 30% flow shown on the controller read out. I reckon mine is closer to 12k lph at that wattage which is still efficient, but takes away flexibility for reducing flow further.

    Sent from my Pixel 4a using Tapatalk

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    Quote Originally Posted by Rmackint View Post
    I am new to this forum, I have kept koi for 20 years and have two ponds a circular 30,000 litre and a rectangular 50,000 litre. My energy costs are very high and would like to change the filtration and pumps for my 30,000 litre pond. It currently uses two Argonaut 14 which are each 500 watt pumps. The system is gravity fed going through two vortex’s and then through the two pumps into 2 Aquadyne filters. They have done a great job and my pond is crystal clear with some very large koi. I am thinking of replacing the Aquadynes with a gravity fed Oase drum filter similar to the system on my 50,000 litre pond. My question is what would be the best low energy pumps to use with the Oase gravity fed drum filter. My return pipe work is twin 1.5 inch pipes running for about 6 meters with 3 x 90degree bends in each pipe that return through tangential returns on pond wall. I can’t change this pipe work as it is embedded in concrete. I am looking for a pump or pumps that will meet the flow needs for this pond and use the minimum amount of energy.

    I run 2 Evo Vari pumps.

    1x 10000 Lph (drum)

    1xx 20000.Lph (bakki)

    The 20000 is running flat out at 100% (232 Watts) supplying bakki and one direct return, which I feel still hasn't enough flow.

    I'm think of upgrading to a 30000 on the Bakki and increasing the pipework size to also aid flow and hopefully reduce power consumption.

    Screenshot_20220705-095618.jpgScreenshot_20220705-101302.jpg
    Last edited by Ruffers22; 05-07-2022 at 10:29 AM.
    EZ-pond 1200i Semi-Raised Pond, Spin-drifter BD, Oase Aquaskim, Oase Proficlear Compact Gravity, 1x Bermuda 10,000, 1x Evo-Aqua 20,000 Vari Wi-fi Pumps, 2x Evo-Aqua 70L Air Pumps , Evo-Aqua 55w UV, Aqua-Sieve Midi, 3 Tier Fabricated Stainless Shower, Hydro-Pro Z7 Heat Pump, 48" Big Blue De-chlorinator, Profi Auto Feeder & Seneye Pond Pack.
    "That'll do pig. That'll do"

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    Senior Member Rank = Supreme Champion davethefish1's Avatar
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    i've just had a look at the pondexpert site and they do state all the lph and wattages.
    https://www.pondxpert.co.uk/files/Do...ow%20Chart.pdf

    so are the wattages and lph listed what you actually get at the stated maximum head height?
    or just the maximum possible head height at a given wattage?

    and the lph and wattages stated are at 0 head height to an open ended pump with no pipework,
    as there is no pump curve graph?

    Last edited by davethefish1; 05-07-2022 at 10:56 AM.

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    Just checked my 18000 Jebao Tsp and at 30% its 24 watt over the shower but I run it at 80 watt.
    John

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    Senior Member Rank = Grand Champion samp09's Avatar
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    Quote Originally Posted by Ruffers22 View Post
    I run 2 Evo Vari pumps.

    1x 10000 Lph (drum)

    1xx 20000.Lph (bakki)

    The 20000 is running flat out at 100% (232 Watts) supplying bakki and one direct return, which I feel still hasn't enough flow.

    I'm think of upgrading to a 30000 on the Bakki and increasing the pipework size to also aid flow and hopefully reduce power consumption.

    Screenshot_20220705-095618.jpgScreenshot_20220705-101302.jpg

    When I changed my pipework from a 1.5" to 2", even running at 20% less on my pump I can clearly see the flow is faster in my pond! It makes one hell of a difference and you may find if you change all your pipe to 3" you will get the flow easily with your 20k pump and less usage too.

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    Senior Member Rank = Supreme Champion davethefish1's Avatar
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    Quote Originally Posted by samp09 View Post
    When I changed my pipework from a 1.5" to 2", even running at 20% less on my pump I can clearly see the flow is faster in my pond! It makes one hell of a difference and you may find if you change all your pipe to 3" you will get the flow easily with your 20k pump and less usage too.
    To be fair i think 3" is over gunning it a little for a 20,000 lph pump.
    Especially if its only doing about 10,000 lph actual due to long pipe runs and head loss to a shower.
    I'd only go up to that for a 30,000 pump pushing 20,000 lph actual.
    i only went that big with mine because 2.5" pipe is a pain trying to get fittings for but would be a great size for 10,000 to 15,000 actual lph.

    Alternatively you could go 75mm metric that is about the same diameter as 2.5" pressure pipe

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  32. #17
    Thank you all for the advice, it is really helpful. I will run 2 EA Varipump 2000 and replace the Aquadyne with a Oase drum filter module and moving bed module. All the parts are on order and I should make this change in the next few days. I have to keep my return pipework at 1.5 inch as it is buried in concrete none the less I should have a massive reduction in energy requirement
    Last edited by Rmackint; 05-07-2022 at 08:07 PM.

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    Senior Member Rank = Supreme Champion davethefish1's Avatar
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    Quote Originally Posted by Rmackint View Post
    Thank you all for the advice, it is really helpful. I will run 2 EA Varipump 2000 and replace the Aquadyne with a Oase drum filter module and moving bed module. All the parts are on order and I should make this change in the next few days. I have to keep my return pipework at 1.5 inch as it is buried in concrete none the less I should have a massive reduction in energy requirement
    you'll probably have to run them quite hard to overcome the long run 6 meter of 1.5" pipework.
    but they will be less than half the wattage you are using now

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