Ammonia and nitrates high after adding 2 fish to new tank.

[125intx]

I started out with two fish in a 30g. The tank was only month old. I added two more fish last Sunday and now the fish are breathing very hard. I checked the water and the ammonia and nitrates are very high. I did a 50% water change and it seamed to fix the problem until this morning. The fish are breathing real hard again. What can I do to get the numbers back down on the tank? Should I do another water change? Of is there another way to do it?
Thanks for the help.
Chris

 

[johnzo]

Wow I looked at this and said ....I don't remember posting this....lol

 

[125intx]

Thats funny, but I was here first

 

[johnzo]

She isn't going to like it when I go for the Orange Helmet!

 

[lion_crazz]

Do you have live rock in this tank? Did it finish cycling? I would stop doing such large water changes. Do smaller, more frequent ones. I might also add some form of bacteria to increase the biological bacteria in the tank, in order to bring the levels down faster. Cycle and TurboStart work fairly well.

 

[125intx]

Well its been stable for a few days now. I hope its calming down.
Thanks for the reply