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  1. #1

    Aerated bottom drain

    Should I leave my aerated bottom drain running over winter or should I switch it off until the spring when temperatures start to rise currently pond is unheated hoping to install some type of heating soon.



  2. #2
    Extreme Koi Member Rank = Mature Champion pip895's Avatar
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    Is your pond covered? If it is you may never get below 5 degrees. Provided the pond temperature is above 4deg then no harm running an aerated BD. Below that then turn it off and if you can reduce the flow through your filters. I used to turn off my bottom drain and only take water from the skimmer when temperatures were very low but then I'm not fully covered.
    6000g in ground koi pond
    +3000g lily/Anoxic pond attached
    29 koi (40 to 65cm)
    Bottom drain, Mid water & Skimmer to Drum
    JBR boichamber->Blue eco 500 pump ->below surface return.
    Blue Eco 240 -> Large MB -> Waterfall -> Planted Anoxic pond (25 baskets)

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  4. #3
    Thank you pip I’ve yet to buy the polycarbonate sheets my pond temperature has not dropped below 6 deg so far.

    so I’ll keep the air pump switched on and keep an eye on the temperature in the meantime ����

  5. #4
    Senior Member Rank = Grand Champion andikoi's Avatar
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    i leave everything on,andi

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  7. #5
    Quote Originally Posted by andikoi View Post
    i leave everything on,andi
    is your pond heated

  8. #6
    Senior Member Rank = Grand Champion andikoi's Avatar
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    no not heated but is covered all year,andi
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