10.  You have enough salt creep to make up water for a 20% change
9. Your Bare Bottom is now a Deep Sand Bed
8. You could start a highly profitable business just selling off your spaghetti worms
7. Your 20k bulbs look like 7ks
6. The green star polyps are so hardy that they are growing out of the tank and up your walls
5. You measure phosphates in Parts Per Thousand
4. You calculate the half life of your carbon before you consider replacing it
3. When scraping the calciferous algae off your glass, the water level dropped noticably
2. You finally noticed the large pile of carpet jumpers behind the tank
1. Your filter socks can be reused as live rock