No plants ‘require’ CO2 so to speak, but it helps boost growth. Flourish excel is basically bottled CO2, so you could do that. Most red plants will just grow a bit greener without CO2. I have some variety of Ludwigia repens, and it stays pretty red, as the leaves reach higher toward the light. But the best thing to do is just try something. Test it out, see what works and what doesn’t, because nobody‘s tanks are the same.
I use two 24 watt fluorescent tubes on my regular 29, and am just able to grow red plants. That’s 48 watts of light, from one pink and one blue tube, so your 37 on a tall tank might not be strong enough when it hits the bottom. If you end up dosing excel (I do and it works fine for me) then maybe try Alternanthera Reineckii, or it’s mini version (also known as AR Mini). I’ve had success with that.