Fish Deaths please reply ASAP

Question
How long has your tank been set up?
-month or so

How big?
-20 gallon

What type of fish?
-only two female swordtails and a molly female left...

How often do you change water?
-once a week

How much water?
-20% - 25%


Okay hers my question I used to have 13 fish in my 20 gallon (6 tiger barbs, 1 giant danio, 3 swordtails, 1 molly, and two zebra tetra things) Now im down to about 3 fish (listed above) and im afraid thier time is comming to a close :( Im 99% sure its because of nitrate/nitrite/ammonia poisoning (some call it new tank syndrome) My question is, for now, how can i treat it, I plan on going to the pet store as soon as i can but not sure when ill be able to get over to the pet store. (or when ill have money to spend). So what should i  get from the pet store and how ofter do i use it...also i have a ten gallon tank with 20-25 baby swordtails, i have no clue how to take care of them and raise them, please give me all the info you can so i can be a baby fry expert! lol


much thanks, please reply ASAP before more fish die...


MUCH thanks, Sean

Answer
Hi Sean;

The good news here is that you don't have to buy anything to help your fish, but it will take some work on your part. Make a 25% water change every day for the next four days. This will lower the waste toxins without stressing the fish further. Be sure to use a water conditioner when you add the new water. There were simply way too many fish for the tank to get through the break-in period without losses. Here is a link to my article on new tanks to help you know more about what happened;

http://www.xanga.com/Expert_Fish_Help

The baby swordtails just need frequent water changes (25% twice a week) and crumbled up fish food. Keep live plants in their tank so they can nibble those too. They also like frozen brine shrimp and bloodworms. Feed them at least twice a day. Be sure to remove any uneaten food from their tank right away. You can siphon it out, net it, or use a turkey baster to suck it out.

I hope all your fish do better very soon...

At Your Service;
Chris Robbins