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I have a 3.5 gal betta tank with one fish in it and planted the plants I bought at PetSmart in regular gravel at the bottom. One of them I just left floating because I wanted the shade. All plants are doing fine! I haven't given them any fertilizer or anything. I might in the future if they...

Thank you...I'll let you know how it works.

Update: I ordered a 25 watt Cobalt heater with a temp control on it. I'm just afraid with winter coming my Betta will get too cold. I will monitor temp with thermometer. Any suggestions on temp setting? I'm thinking 78. Thanks.

Thank you for responses! I appreciate your help. I think you're both right about this heater. There is no place to set temp. You would think it would have an auto shut-off at 80 degrees or something. I went ahead and ordered a thermometer today. I think my next purchase will be a good...

Hi All, I'm completely new to owning fish. I got a betta about 6 weeks ago and everything is going great. My betta is in a 3.5 gallon tank with low-flow under-gravel filter, LED lights and plants. I kept reading that I needed a heater. So I got one. I turned it on yesterday for the first...