Then freeze the packed columns and butane down as cold as you can and pull them out right when you will extract. If multiple columns, only pull one column and solvent for that one tube.
Used chest deep freezers are usually cheap on cl because folks often sell them cheap when moving.
I have a 300 gallon vertical storage tank. They are about 400, ace roto mold makes em as well as others.
Make sure you can fit the tank you buy thru doors and vertically at final location, preferably on 16" of concrete blocks.
Fought slime and tried running sterile with everything under the sun, chillers, recirc, pool shock...
Benificial bacteria solved my problems and allowed operation sans chiller / recirc.
All this whining about nails burning the oil....
If one simply heats it up till it glows real good and then WAIT 20 - 30 seconds before dabbing = flavor bomb. You want to hit the nail just before its at a swamp temp. If swamping the nail your waiting a bit too long.
Personally I dislike...
I remember the shitty cigars that come in the glass test tube... just heat the side on the end and use a metal tool to poke and enlarge a hole. Walla.... we used to do errl in those over 10 years ago, that and the glass paddles lol.
Cold dewaxing column and cold tane.
Cut down your unbleached filter so it fits on top of the 25u screen, just lay it there. This is only for particulate not lipids / waxes.