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  1. #1
    Senior Member Rank = Yonsai Mode's Avatar
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    Aeration- is it possible to have too much?

    Ok so have two airstones and they are creating a huge amount of bubbles - should they be on a timer or ok to leave on the whole time?

    Cheers!!


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    10,118Gal 46,000l
    Nexus320
    Cloverleaf GenesisII(5 bay)
    2x13,000lph pumps, 2xEvoAqua75wUV
    11 Koi

  2. #2
    Senior Member Rank = Rokusai Simon Fish's Avatar
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    It is possible for the water to become super saturated with oxygen.
    Warmer water holds less oxygen so more of a need with higher temperatures.
    Numbers/size of fish using the oxygen??
    If you have any falling water that will also be airating it.
    If there's plants or algae more need for air overnight.
    Beneficial to have air into filters.

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  4. #3
    Senior Member Rank = Yonsai Mode's Avatar
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    Thanks!

    Seven new koi in new pond. Already have air into nexus 320 as well.

    Perhaps on timer for the middle part of the day?




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    10,118Gal 46,000l
    Nexus320
    Cloverleaf GenesisII(5 bay)
    2x13,000lph pumps, 2xEvoAqua75wUV
    11 Koi

  5. #4
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    There's a few threads on here discussing this exact subject, worth having a search for, probably via Google as opposed to the search facility on this site.

    Think the conclusion was yes, it is possible to have too much air to the extent that too much air can do more bad than good.

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  7. #5
    Senior Member Rank = Yonsai Mode's Avatar
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    After a search a bit of reading I have decided to put the air pump on a timer - 3 hours a day during the hottest part of the day. Kind of makes sense to me based on the reading I have done!

    Cheers all!

    Mode
    10,118Gal 46,000l
    Nexus320
    Cloverleaf GenesisII(5 bay)
    2x13,000lph pumps, 2xEvoAqua75wUV
    11 Koi

  8. #6
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Quote Originally Posted by Mode View Post
    After a search a bit of reading I have decided to put the air pump on a timer - 3 hours a day during the hottest part of the day. Kind of makes sense to me based on the reading I have done!

    Cheers all!

    Mode
    Just to throw a spanner in the works, there is reduced oxygen at night time due to lack of photosynthesis.

    I don't know enough about the subject to advise, but I ran through last year including the baking summer with no air, just a surface level return. Had no problems. That was 8 small to medium (32cm) koi in 7000 litres.

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  9. #7
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    My thoughts are - every column of air bubbles that are rising up through the water if wide enough is an area of water where the fish can't swim as there is very little water to support their weight so yes if you basically turn your pond into a jacuzzi then that's too much aeration sure each column of air is adding to the surface area of the pond so it will support more fish or bigger fish but at the same time you are loosing volume of water so it's a case of working out how much aeration you require for your specific needs and going from there isn't it? If the oxygen levels are too low it will soon become obvious as the fish will be up at the surface gasping for air or hanging round the filter returns etc. Oxygen levels drop at night and in the heat so maybe once you have got the volume of aeration correct you could control your air pump with a thermostat and a timer so if it gets too hot it comes on and then at night it comes on and the rest of the time it's off but to make it simpler just leave the air pump on all the time?

  10. #8
    Member Rank = Nisai AJB's Avatar
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    I have an air pump running continuously. I have two stones in the pond, one at each end and one in the filter. The pond ones I throttle back to gentle bubbling most of the time and the filter one is full on. Fish are happy. I also have a line that air washes the EA media when I clean the filter.

  11. #9
    Member Rank = Nisai AJB's Avatar
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    Meant to add that I use a valve with 6 outlets, each of which has a tap. This gives full control.

  12. #10
    Senior Member Rank = Yonsai Mode's Avatar
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    One thing I wish i had done is bought self weighted air lines - have had to lower in rocks to pin down the lines!

    Timer setup for 3 hours a day!
    10,118Gal 46,000l
    Nexus320
    Cloverleaf GenesisII(5 bay)
    2x13,000lph pumps, 2xEvoAqua75wUV
    11 Koi

  13. #11
    Senior Member Rank = Grand Champion andikoi's Avatar
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    wait until water warms up and go swimming to replace them lol,,,,andi

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  15. #12
    Member Rank = Nisai AJB's Avatar
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    I bought weighted black air lines as the ones that float are unsightly. They are very good, but I still find that the bottom drain gradually sweeps everything towards it. I have fixed lumps of stone to the lines near the air outlets to try to counteract this. My pool is quite long and narrow, so I have air running continuously (not a torrent - just gentle aeration) at each end, and the central area is clear so we can see the fish. I might try the timer approach myself actually. Sounds sensible.

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  17. #13
    personally i hate looking at a column of bubbles, i stopped using airstones in the ponds about 8 years ago without any problems ive just been pumping a lot of water over a shower and mine are fine

  18. #14
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by sephuk View Post
    personally i hate looking at a column of bubbles, i stopped using airstones in the ponds about 8 years ago without any problems ive just been pumping a lot of water over a shower and mine are fine
    Yeah am with you on that one asked the question on here the other month about it and toke them out so much nicer being able to see my fish without all that water disturbance . Fish seem more that happy . They didn't seem to like the amount of air I had going

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