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Pond Temps?

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Re: Pond Temps?

Post by alank on Tue Oct 18, 2011 7:37 am

We have cold weather forecast. I have been monitoring temps every other day for weeks now and have found that as ambient air temps drop, the shower cools the water down with a 1 degree lag. ie, the pond is 1 degree warmer than the air temp.

I have enclosed the whole pond today, the temp in the enclosure is 1 degree warmer than the air outside, this was today with no sun and overcast.

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Re: Pond Temps?

Post by Admin on Tue Oct 18, 2011 9:47 am

alank wrote:We have cold weather forecast. I have been monitoring temps every other day for weeks now and have found that as ambient air temps drop, the shower cools the water down with a 1 degree lag. ie, the pond is 1 degree warmer than the air temp.

I have enclosed the whole pond today, the temp in the enclosure is 1 degree warmer than the air outside, this was today with no sun and overcast.

Alan there are SO Many Factors/Variables to consider ie `Wind` force etc a Major contributor to surface heat loss ..

Since floating the UV Resistent bubble-wrap on two thirds of the `Tropical` WLP where Silver Dollar still resides along with his Goldfishy Pals Very Happy Rolling Eyes Temps have stabilized exponentially despite the gale force winds and torrential rain ...

I`m monitoring it closely though ...

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Re: Pond Temps?

Post by Admin on Wed Oct 19, 2011 1:10 am

WLP down to 19C in the `open` section Shocked

Much warmer than that though around the heater in the `Bulrushes Thank Goodness ....

Just did a 50% water change on the 4ft Aquarium and will drop the temp to 20C gradually to match the Tropical Silver Dollar Pond ... then bring him indoors for Winter ....

He will not be `Happy` about that .... Rolling Eyes

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Re: Pond Temps?

Post by alank on Wed Oct 19, 2011 2:27 am

I have a 6 degree difference between outside and inside the enclosure today.

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Re: Pond Temps?

Post by Admin on Wed Oct 19, 2011 2:38 am

alank wrote:I have a 6 degree difference between outside and inside the enclosure today.

What Temp is the water now Alan ?

Do post pics of the enclosure in the `Gallery` section Sweetie Very Happy

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Re: Pond Temps?

Post by Admin on Wed Oct 19, 2011 8:08 pm

Dry and sunny so far ... will be tackling the `Plumbing`later.....


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Re: Pond Temps?

Post by DaveB on Thu Oct 20, 2011 4:16 am

Forcast for NE england down to zero tonight. Pond is still holding at 16 degs C at a cost of £1.10. per day Lets see if it still holds after tonight

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Re: Pond Temps?

Post by Admin on Thu Oct 20, 2011 4:38 am

I managed to re-fit the UV via an 8,000 lph submersible Pump due to my not being able to see the bottom very well since I removed it ... Rolling Eyes


I`ve used Alfagoma temporarily to plumb the UV until I can bracket it to the wall and hard-pipe it ...

Koi were up 2C to 20 degrees ... cover on ... but can be rolled back easily once the ground is dry enough to level ... Like a veritable `Swamp` out there atm Twisted Evil

We have very low temps forecast too Dave ... good thing you covered the pond when you did Very Happy


Vacuumed ... and replaced 30% of the water .... too and hope the `Green` tinge will vanish soon ....

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Re: Pond Temps?

Post by Admin on Thu Oct 20, 2011 9:59 pm

Trickled in a tad too much overnight last night Guys Embarassed

Good thing the Vat is completely covered Shocked



I`m siphoning 6 inches out as I type Rolling Eyes


Temps down to 18.3C due to all that fresh water overnight ...


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Re: Pond Temps?

Post by Admin on Fri Oct 21, 2011 6:20 pm

I went out Pre-Dawn` to test PH/DO/Temp values to asses the dawn/dusk swing which is better than I expected ... Very Happy

PH = 7.16

DO = 8 mg/l/ppm.

Temp =21C-ish.

The WLP is buffered to offset the torrential rain ... it being only 1,000 litres.

Maintaining the GH below the KH value is possibly stabilizing the swings.

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Re: Pond Temps?

Post by alank on Fri Oct 21, 2011 6:59 pm

How do you measure DO?

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Re: Pond Temps?

Post by Admin on Fri Oct 21, 2011 7:16 pm

alank wrote:How do you measure DO?

I have a bench meter Alan which is too large to be mobile Rolling Eyes so until I spot a bargain such as a `used` DO Meter like > http://www.ebay.co.uk/itm/YSI-ProODO-Optical-Dissolved-Oxygen-Meter-/320759017507?pt=LH_DefaultDomain_0&hash=item4aaeba3023#ht_4430wt_956

I use Tetra 02 Test Kits which are adequate for now Very Happy

Far left in the pic >



http://www.ebay.co.uk/sch/i.html?_trkparms=65%253A12%257C66%253A2%257C39%253A1%257C72%253A5251&rt=nc&_nkw=tetra+oxygen+test+kit&_dmpt=UK_Pet_Supplies_Fish&_trksid=p3286.c0.m14&_sop=15&_sc=1

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Re: Pond Temps?

Post by Admin on Sat Oct 22, 2011 12:43 am

Well based upon the DO Sats Calculator here >

http://www.fivecreeks.org/monitor/do.html

DO = 8ppm/mg/l

Altitude = 25 m

Pressure = 766 mmHg

Temp = 21C

calculates at 90% 02 saturation at dawn Shocked

I`m impressed .. given the lack of surface movement (covered) in the dark and cloudy /overcast Very Happy

I must test the Koi Vat at dawn soon also by way of a comparison ? I have no Life Laughing

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Re: Pond Temps?

Post by alank on Sat Oct 22, 2011 1:41 am

How do you find time? I am trying to get some work done for a change.

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Re: Pond Temps?

Post by Admin on Sat Oct 22, 2011 1:53 am

alank wrote:How do you find time? I am trying to get some work done for a change.

Me too Alan ... Rolling Eyes

Just walked back in from washing the Car Rolling Eyes and have a ton of studying to do re the `Astrology Degree` Sad

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Re: Pond Temps?

Post by Admin on Wed Oct 26, 2011 6:26 pm

Cold and wet here today Guys ...

How is the Weather with you Lovely Lot Very Happy Pond Temps etc ?

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Re: Pond Temps?

Post by DaveB on Wed Oct 26, 2011 6:34 pm

Supposed to be a nice sunny day after a night of heavy rain. I will take the opertunity to do a bit of maintenance today.

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Re: Pond Temps?

Post by Admin on Wed Oct 26, 2011 6:43 pm

Temps on the WLP have held @ 17.8 C despite my decommissioning the `Heater` yesterday Very Happy

Koi Vat is back up to 19C Very Happy hope the 2C increase will assist in reducing the Nitrite Rolling Eyes

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Re: Pond Temps?

Post by Admin on Fri Oct 28, 2011 6:21 pm

The WLP Goldies temp has dropped to 14.3C since decommissioning their heater !

6C Ambient air out there atm but rising to 14C later today...

England are supposed to be hitting 18C this afternoon Shocked Hope that includes you Guys too Very Happy


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Re: Pond Temps?

Post by DaveB on Fri Oct 28, 2011 7:40 pm

We will be lucky to hit 14 degs me thinks. Pond still at 16 degs with timer on for 2 hours during the evening. I have decided to wire my themostat back on the boiler rather than just on the timer. This has helped to control the temp better with having such daily weather swings. The thermostat is set at 16 degs C and the timer is set for 2x 1 hour periods. At the moment the boiler is on for most of the time during the 2 hours so I more or less know what it is using.

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Re: Pond Temps?

Post by alank on Fri Oct 28, 2011 8:00 pm

3 degrees outside this morning, 13.3 in the pond enclosure and 14.5 pond water, no heater as yet. The enclosure is really working to keep the temps up. It was 18 degrees in there yesterday with a bit of sun, 9 degrees outside.

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Re: Pond Temps?

Post by Admin on Fri Oct 28, 2011 8:45 pm

The Koi Vat is @ 18.4C with the stat still set to 17C so the Insulation and covering is holding up quite well atm Very Happy and they still have 25ppm KH despite 2 inches of rain Very Happy I have drastically reduced their `Food` rate since the 10ppm Nitrite Spike though Twisted Evil

Alan ...

Sounds like your enclosure is maintaining stable temps in there Very Happy

Dave ...

Two hours per day to maintain 16C sounds great Very Happy My Elecro heater light is on all of the time at night affraid

Twill be interesting to see how quickly temps decline in the WLP which only holds 1,000 litres ? is in Ground and un-insulated but does have a 200 micron Solar Pool Cover ....

The Koi Vat Solar Pool Cover is 400-500 microns with 7 layers of AL2 foil insulation wrapped all the way around Very Happy

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Re: Pond Temps?

Post by Admin on Fri Oct 28, 2011 10:56 pm

We are up to 14.1C ambient air already Very Happy

Glorious Day so phar Very Happy

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Re: Pond Temps?

Post by Admin on Sat Oct 29, 2011 8:47 pm

Freezing Cold and Raining this Morning brrrrr ! around 4C Shocked BUT WLP holding @ 14.2C Smile

Alan ..

I`ve moved the F.I.T Payment Scandal to it`s own thread in Chat ... continue it there or on Dave`s `Solar Power` thread Sweetie.


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Re: Pond Temps?

Post by Admin on Sun Oct 30, 2011 10:48 pm

Temps in the Show Vat are 18.8C still Very Happy with ambient air 15C here in the Welsh Tundra today Guys ... Koi were climbing over each other and out of the water for phood Laughing hope your temps are better still .... Very Happy

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