Osteole wrote:

I have read ALOT about tank conditions on the internet and many
people/sites have commented about the ability for betta's to
comfortably live in temperature of water the range I suggested above.

Well, "many people/sites" are WRONG! You ask for advice from this group and
then reject any suggestion that you are doing things wrong. "Many people"
here have told you that. Either pay attention or take up some other hobby.

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It's turtles, all the way down