HI all - I'm a newbie. I just have a question. My fish isn't like his normal self lately. I've been reading a lot of stuff on this site. It's so cool. Kinda overwhelming too. Had my fish for 1 month. First 2 wks in a small fish bowl. Upgraded to a 1.5 gal tank with whisper filter, 2 fake plants, gravel and a light. He was so happy being in a bigger tank. After reading all the stuff about filters I unplugged it today and also just this morning put a heater in. I don't know the temp right now. Going to get a therm.today (in an hour.) My daughter doesn't have a heater on her 3 gal tank and it's 72 degrees. So mine is probably close to that. He is staying near the heater. I set it to 79 degrees. I changed 30 percent of the water this morning. Yesterday I put in Fungus Clear a small piece of the tablet. His fins are not spreading out like they use to. They seem to be very tight (esp tail). His appearance isn't as good either. He is doing better than yesterday though. Swimming more but still not himself. I want to make him better. So much to learn. Yikes. I will upgrade in near future to a 5 gallon tank after reading all the comments. Oh, I also brought a sample of the water into Petco last night and they said everything was fine except the water was a little hard. I use Hinckley Springs water - declorinated and added a few drops of stress. Any advice. Oh, I forgot my cat did drink out of his tank about 6 days ago. I should not of allowed that. Opps.