eventually I want to get into all grain brewing and have been looking into those Rubbermaid set ups that the online brew stores sell.What size cooler set up would I need to do10 gallon all grain batches?
Generally for all grain if you double the size of the containers for the batch size you will be safe for almost all brews under 1.100 OG after that you pad with DME or go other routes. So simple answer is 20 gal will suit you for 95% of your brews.