I think you know when you've got a problem when:
1. You steer towards the tank the moment you get in.
2. You go to Lfs more times than the grocery store.
3. Your house looks like a sunbed shop.
4. Sniffing your tank makes you feel at home.
5. Holidays tend to involve going to a aquarium.
6. You're taught you kids Latin names for corals to impress the store keeper.
7. You have more tanks than the average Lfs.
8. You only watch tv to see if there are any reef related program's on.
9. You taste freshly made salt water to see if the salinity is right.
10. The welfare of your corals take more importance than your own health.
11. Your never ever ever happy with the look of your tank.
12. Your work colleges know more about you tank than they do your family.
13. Your bank account reads more money spent on the tank than anything else.
14. You spend every minute of the day your not with your tank, thinking about your tank.
15. You can't wait to feed your tank.
16. You can't see coral growth quick enough.
17. You have more online reefing friends than real ones.
18. Finally yourve just answered yes to more than 1/2 of the above and thought yourself is that enough!
Edit: another one: you have a vodka with your tank
welcome to my world.