Who Gives A Fish Forums

Lighting might be the issue. The 24/7 mode is cool but maybe not intense enough for reds. Try cranking it to 100% for 6 hours. My Rotala H'ra went from pink to fire engine red after I switched.

You don't necessarily need a heater in the tank if you can maintain a consistent warm temperature in the house, like around 84 degrees F.

I'm curious, Nick, you think it's possible to breed bettas without a heater? 74 degrees, that's the temp I'm working with, would that be enough?