Sorry if this has already been asked but I could not find a thread on it.
I keep reading that you should not remove your fish from the tank when you do a water change because it will stress them out. So my question is, how do you add the new water to the tank without the temperature dropping? My room temperature water is around 70 degrees, so I am afraid that if I add it to the tank while the fish is in there the temp will drop quickly and harm my fish.
Presently when I do a water change I remove the fish, take out 50% water, add the new water, then let the tank sit for an hour or so until the water is back to normal temperature. Then add the fish back in slowly by letting him float in a cup on the surface for 45min or so while slowly adding some new water to the cup so he can adjust to it. It is kind of a long process. Is that not necessary? Can I just leave him in there while adding the new water?
Also, I have a 5.5 gallon tank, heated, with no filter. So I plan to do 50% water changes every few days.