Lol..when I was reading the title of you post, I just remembered the most stupid thing I ever did. Omg.
Okay so I was told I needed an air stone for my goldfish tank. I had no idea how it worked, only that it was supposed to oxygenate my tank. So..I went to Petsmart and found some nice little blue airstones, and they were aonly like 50 cents!! I thought I had found the best deal on earth, and I bought two. I got home, plopped them in the tank, and nothing happened!! No bubbles came out!! So I thought hmmm...maybe its really high tech and even tho I couldn't see any bubbles, it was still aerating my tank. So I left the little airstone in my tank for a week before I read some info somewhere on the site about how aeration works. After that, I foolishly removed the air stone.
Omg...well, we were all young and stupid back then..right?

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