My betta seems very happy, he's very active and has made bubble nests since I brought him home 2 months ago. However, it's only been in my own research that I've found out that they should have a bigger tank and a heater. I got him a bigger bowl than the pet shop was suggesting because I thought the tiny thing was crewl!
My question is though, if he is happy & healthy in this temperature, is it really nessissary to buy a heat lamp? I'm concerned that the temperature change would send him into shock too.