Saulosi, I agree with Frontboy7, the more you move or disturb the fish the more stressed they will become. Turn off the lights in the tank for a day or two, let the fish get used to their surroundings. The fish really don't need a light. Feed them a very little each day until you notice them eating regularly.
Just sharing my feelings on what I have learned while being a member of the MCA:
First off let me preface this by saying I have learned the hard way just like everyone else. I have done some very stupid things because I have over thought the situation. What I have learned more recently and will be my motto going forward: LESS IS ALWAYS BETTER. Unless you have no other option, you should try not to add anything to your water. Now there are situations where that does not apply - like using city water to fill your tank that is chlorinated, then you obviously need to add a de-chlorinater to the water.
So I never add any buffers, chemicals etc to my water. I simply do frequent water changes (every 2 to 3 weeks) and vacuum the gravel every other WC. Also something I learned from the Oyers that I never thought was OK, It is OK to transfer fish from a bag to a tank without first acclimating the fish in the tank. Just use a clean (fish only) 5 gallon bucket and a net, just dump the fish into the net and let the water go into the bucket and then release the fish into your tank. NEVER add fish and water to your tank. Now I have seen some more experienced people simply grab the fish with their hand from the bag and gently place the fish into the tank. I haven't gone there yet.
Also, I do not quarantine fish before putting them into my tank, first off I need to explain why, I NEVER buy a fish from a LFS if I see dead fish in their tanks, I simply walk out and try again later. I also NEVER buy fish from a BIG BOX pet supply. Now that I have found the MCA, I will only buy fish from a member or a trusted LFS where I have had no previous issues. We all know the more reputable LFS in the area, so I try to stick to them exclusively.
Good Luck and I hope your new fish adjust well to their new home.
