i use 65 and 100 gallon smart pots...i know people who use bigger ones...
i ran a few mixes this year...i used happy frog and ffof in equal amounts..then coco,perlite,ewc,dolomite,sunshine mix in 6 100 gallon pots...
i used a bag of roots organic potting soil then a local coco blend in the 65s
then have a few in black gold potting soil,one in 707 mix....
they all seem to be similar...but i wont really know till harvest...