m0useanswered grow question 10 months ago Your in NA yea???
Most places use standard sizing buckets. shit you can order from big factories like Uline,
I got all my 5gal buckets from a pub i used to work at. pickles came in them. Other places with big buckets are bakeries, shit like fondant comes in them. Check them out on recycling day. Not a lot of places will have black though. its almost always white. but you can paint them or place a shrink wrap aorund them and seal it up with a heat gun. granted these are all round buckets.
I also got a lot of nice square 3gal pails from a sushi house as pickled ginger came in them. but they where prob 20" high.
The black plastic is going to be the harder part of this I think. any other big bucket can be cut to size and the lid would be half assed but will work if you place a seal on it.
I have seen black plastic in other industries like auto but the stuff in them is not something I'd want my plants growing in.
I would like to find someone who could make custom buckets. I want to get 3 for my tent that would utilize all the space for roots to grow. I ave a 2x4 tent. so something along the lines of. 2-2x2 square or 3-2x1.33 12" deep. would be amazing.
Also thinking. some storage bins might be inline with this. however they are not likely food grade.
Good Luck!