I'm a beginner fish keeper. I bought a ten gallon tank about three days ago. I have the filter (of course), the air pump with an air stone, thermometer, and a submersible heater. I put TetraAqua AquaSafe
in the water to take care of the chlorine/chloramine. According to instructions, 1 teaspoon for every 10 gallons of water.
I bought two new fish today and one of them is already staying at the bottom of the tank. I know a little bit about nitrogen cycling but not that much. Please tell me how I can save it!
I don't even know what kind they are. This was before I released them into the tank. I floated it in the water for about 10-15 minutes. Please identify! Do one or both of them need a heater? Thank you.