I have been doing some homework to bring you this thread.
theory as i understand it is that it is not the layer of polythene that is keeping their pond warm! the tunnel is merely a heat drawing bubble in which the thermal air coming off your own pond is then contained in and its this thermal air that insulates your pond, exactly how a string vest works!! allowing the thermal air to circulate inside the tunnel and of course the moment you get any sunshine on the tunnel then that thermal air heats very very quickly, and the rest is self explanatory!!
Obviously the tunnel also keeps the chilling winds off which is the main cause for severe temp drops, just like blowing the surface of your hot cup of tea, if you blow strong it dosn't take long to cool the surface! the same principle.


Delivery was swift thou they say 7-10 days a great service got mine in 5 working days

pretty impressed how solid it is even with the cover on 10/10 for that guys

with night temps dropping quickly i will be taking water temps , air inside and air outside temps just to show how good i think this tunnel works.

i have to go and get a thermometer in the morning thou they say tonight is 7 degs and in the tunnel there is not such a chill so much so its quite noticeable and pond is at 8degs

the hooks


Attachment to corner


The start of the uprising


frame up [sorry someone couldnt help but get in the shot kids ]


Light was fast fading so had to cover work continues tomorrow


tomorrow i will get the proper camera out and do some show shots

Master that looks the business mate great job let us know the temps you get with your tunnel on hope you left room for a seat and your laptop

Temp update from yesterday or last night temps dropped to 5 deg but the water stayed as posted and the air in the tunnel just felt a little bit like a spring warm morning possiable for the air to remain at 8 deg with this morning the koi being please to see me swimming more actively . As for today the sun is up and shining so we should see an increase in temp thou theory suggests air temp will rocket in the tunnel it should only heat the pond water slowly I will keep you posted

I feel a fool tunnel is near sorted just the door to make and hinge but my heater telling me the temp of the water is up and down like a yo yo think it's broke so I'm at manual temp with what I read @ 13 deg

sounds like its going great master

you could be upto 14 without heat if the pool gets some sun

have you finnished it yet ???

more pic please

i am gona have to go with 2 sheets of polly carb , pond is 2.2 m circular , the sheets are 700 wide so 2 sheets will cover 1.4m just over half , the other half is under the lean 2 so it should hold like last year but look a little better

i will take some pics and a vid of koi before i fit the polly carb and a pic when its on to compare with last yars pic

a tunnel is the way forward mate it will be like my water at the farm running 16 dc aat the mo

kind regards

Mr M

Hi Master
tunnel is looking great mate and glad it all arrived safely and promptly!
looks fromk your temp readings that the benefits are already beginning to show and yes the koi coming up to the door at feeding time like kids round teh ice cream van is another little perk we dont usually like to tell the customers, we prefer this part to be a nice surprise!!
Also means health wise you can keep a much better eye on yoru koi during the cold winter months as spotting an issue early can be key in most cases and with a flat low level cover you will never be able to monitor them this closely like you can with the tunnel.
Glad its all worked out mate and look forward to the final pics!!

Regards
Rob

www.aquatunnels.co.uk
www.aquakoiaquatics.com

more snaps






door frame

Looking good mate keep us up-dated with the temps

ponds showing 12.5 deg
air inside 13.6 deg
air outside 9.2 deg

im happy with this as the little sun we had today it was warmer in the tunnel but lost it because i had it open working on it.

update pleeeeeease

Mr M