Ha, it doesn't matter what size you have you will soon be the owner of multiple tanks....it is the nature of the sickness. The reason that they suggest a larger tank for beginners is that they are more forgiving of mistakes with water quality, ie. it takes more to throw the parameters out of whack in an 80g than it does in a 10g. There is more room for error and fluctuations that and most saltwater life are less able to adapt to rapid changes in salinity and other water quality issues.