Hi all, I'm new to the forums. Ive had my little guy for about 6 months now, and just up until recently I've noticed that he stays in one corner of the tank at the top and just sits there all day. I don't have a proper tank for him, he's in a fishbowl right now that probably barely holds one gallon one of water.
I just moved recently and I noticed that his behavior and mood has changed. He used to be playful and would swim around all day, and also eat multiple times a day. Now in my new place he just sits there in the corner, and sometimes does not eat the pellets I give him. What could be the problem? Do I need a bigger tank? Is a heater really necessary for him?