No, Natasha I think you misunderstood me & I failed to explain it very well.
I meant that many places use Chlorine agents it helps to think that those Chlorine agents are like bleach in the water. This is all done for Water-purification before you get it at your tap.
You can try to dechlorinate the water by shaking it and letting it sit at room temperatures this may help the fish survive longer. Also how large is the aquarium & how many fish are in it. Maybe the fish are dieing because of to much Co2 building up in the water and you need to aerate the water of the aquarium ?
[h2][span]Properly Aerating Your Aquarium[/span][span class="rss-h"][/span][/h2] [span style="margin-top: 6px; font-style: italic;"]Published March 27, 2008 [/span] [/p] By Robert Lashlee[/div]
[div]In nature, fish live in oceans, lakes, ponds, and rivers. These bodies of water all have large surface areas and sometimes large currents as well. This serves to oxygenate the water so that fish survival is possible. However, in an aquarium, the surface of the water is greatly reduced. Therefore, artificial ways of oxygenating he water must be accomplished through aeration. There are several ways to aerate your aquarium and these methods will be discussed in this article.
[a href="vny!://www.ratemyfishtank.com/articles/104"]Check this link for the rest of the article[/a]