I continue to see questions like this on yahoo answers about changing the ph of your aquarium.  New fish keepers will attempt to alter the chemistry of their water with whatever potion they find on the fish aisle of their pet store.  The reality is that almost anything you do to change the ph will be worse for the fish than the ph to begin with.

I put some duckweed into the 55G tank in my office about 3 weeks ago.  As of late, the tank is nearly overrun by it.  Therei s a thick mat of the stuff covering about 60% of the surface of the water.  I was looking in and saw a swordtail fry.  I looked closer and saw dozens of them hanging out in the duckweed.  Apparently floating plants really are good for raising fry.  Up to now, I had been moving my fry into a breeder net.  I decided to leave them in the duckweed to see how they do.
I am going to try to get pictures tomorrow. 

I've been spending the past week bouncing between playing with my kids and their new toys, finishing a room in my basement for my wife, and putting together this site. The site uses Drupal. It's a bit intimidating at first - but that is mostly because of the flexibility.