Yesterday, I was at PetSmart buying cat supplies.  When I went to pay, I was in front of two college-aged girls, who were your typical coeds.  They were buying a Betta fish. 

Coed #2 (the one along for the ride):  So, like, what kind of water do you put him in?

Coed #1 (the one actually buying the fish):  I don't know.  I'll have to ask.  (Pauses)  Distilled water?

Coed #2:  That sounds right.

Watergirl:  vigorously shakes head "No."

Coed #1:  Not distilled water?

Watergirl:  Not unless you want to kill him.  I mean, the pH is wrong, and...

Coed #1:  So what do I use?

Watergirl:  You can use tap water, just set it out overnight so that the chlorine dissipates.

PetSmart Cashier:  Or you can use spring water

Coed #1:  You mean like Evian?