So I have read all over the internet that glass is pretty much universally better than plastic. I am looking to get a system set up where I have one primary fermentor and 2 secondary fermentors basically for faster brewing. I know for sure that i want a couple of carboys for my secondary's but for my primary I am still unsure. It is much cheaper to go with say a 7+ gallon bucket and with all that extra space blow off is much less of a concern. My concern lies in sanitation issues, typically how long can I use a plastic bucket before sanitation issues begin to occur, scatches for example?