Best fish for a 1 1/2 to 2 gallon aquarium w/o heat

Question
I have a small 1 1/2 gallon aquarium for my daughters room. It has a an air filter/ with gravel but no heater.  We have purchased first a Mickey fish that lived for about two or three weeks and died and then we purchased a Goldfish and a tiny frog and put them in together. The goldfish only loved about 24 hours and the frog lived about 5 days.  This time we had filled the tank with distilled water and also added a half- teaspoon of aquarium salt as well as a drop of dechlorinator.  WE floated the fish and frog for about 15 minutes before putting them in.  The first time we did the same thing but used tap water.  What am I doing wrong my three year old is heartbroken that her fish keep dying.  We were only feeding the Mickey once sometimes twice a day and have done the same with the frog and goldfish.  We also really liked the frog and wold like to get another if he could survive perhaps even instead of the fish.  Thankyou for your help I just hate to keep haivng my daughters heart break over her pets.  
Rachel

Answer
Hi Rachel;

It's a pretty small tank for anything but one frog all by itself. If the tank temperature stays above 76f all the time you could instead have a male betta in there. If you like to keep platies and other small community fish you might consider getting a 20 gallon or larger. You should know about "New Tank Syndrome", also called the "Break-in Period" or "Cycling" too. Here is a link to my page about it;

http://www.xanga.com/Expert_Fish_Help

Here are some other web links for you to too;

http://fins.actwin.com/mirror/begin.html

http://www.firsttankguide.net/steps.php

http://www.firsttankguide.net/capacity.php

At Your Service;
Chris Robbins