Spend $50 on a pond pump and give it a go
Folks have had success with this critter: https://www.bghydro.com/eco-633-water-pump-594gph.html
(Dozens of reports of success lying around here…)
Ok, I will try that pump… Also what about the coil in the tank? Is it unnecesary when i will prechill the jacketed tank over night and extract only once the next day?
I’d pull a vac on the jacket for insulation, and chill using the coil.
Unless you’ve got a double jacketed tank…
It’s not like you’re in a hurry.
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No, not at all 
I’m in the procces of choosing a tank… So order double jacketed or just single jacketed with a 1/2" coil in the lid? maybe with a coil there is a small chance of leaks and contamination of the butane… 
So the the double jacketed would be safer…??
Nope. Not safer.
Insulated.
And you can cool the jacket.
So more (chilled) surface => cools faster.
Also more expensive…
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Not really…
However, if you don’t USE the coil, and leave it open to atmosphere, it can/will condense water, which when frozen can rupture the coil.
Reported here somewhere…
Edit: where is the “raise your hand if you’ve done something stupid the rest of us could learn from” thread again?
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Safest just use double jacketed tank… But man it is getting expensive. Can’t I just use some kind of insulating sleeve on the single jacketed tank? Is the vaccumed jacket the best insulation?
I read it somewhere about the open coil…
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