Hi everyone I'm new to this forum and I'm not sure I've put this question in the right section but I apologize ahead of time if I've done so.
I have 3 bettas. Each in their own 5gal tanks. I got my first blue betta about 3 months ago in the spring-ish time and then got addicted. 2 months after that I rescued a white/red one and a few weeks ago I rescued a iridescent white one that seems to change color depending on the time and light. I have my blue one and my red/white one downstairs in the living room where it's cooler, and 1 in my room where it can get pretty hot during the day.
Now, I know bettas need heaters to stay warm and none of my betta tanks have a heater. Also I don't use florescent light for them, they get enough natural light as it is. (before anyone starts tripping out i can explain)
I've monitored the temperature even overnight and during the spring time. Here in so cali room temperatures are about 75-80 deg F. when I first had them the temperature never got lower then 76 at night time and it would rise up to 78 during the day without a heater. so that was fine and all my betta's were happy.
Now, it's summer. even when i run the a/c my 2 betta's downstairs in the living room have a temperature of 78 at night and goes up to about 82 during the day. My main concern is the betta in my room. His tank is 88 at night, and during the day it's 92. and on very hot days when it's over 100 deg's outside his tank has went up to 96 before and that freaked me out so i did a water change with cold water and he seemed to love that cus he made a huge bubble nest the next day.
So, my worrie is. Can the water ever get too hot and kill the betta? and how can I fix it so that i can cool off the water without having to do the drastic cold water exchange?
Thanks in advance for ur advice ^_^