On the other hand - When I first started - at the recommendation of an LFS - on day 1 they sold me - 2 clown fish, a tank, an anemone, an incandescent light, an under gravel filter gravel and a heater - some salt - and said 'it will all work out'. Funny thing is - for 2 days it worked great - the anemone was wide open - the fish were in it. On day 3 (when I assume ammonia had built up - the anemone looked like a wet thimble - and the fish were dead overnight. The LFS said 'huh'?
Mine was a 10g tank, some salt, a heater and a damsel. "The damsel cycle". Miraculously the damsel survived. Poor damsel.