Will my plants survive if I remove the CO2?

[lampro]

don't switch between, fluctuating levels are one of the causes of black beard algae (among other things)

so here's the red plants picture (50 shots after LOL) after I remove the CO2 and I reduce the white light brightness down to 60% but the blue and red LED are at 100% brightness to have a nice purple reflections. But this picture was taken the 4th day without CO2 so finger cross that all plants will thrive in this tank. BTW that's my new betta, I was so happy when I got him but he hasn't eat anything for 3 days now. His gill is black and look a bit swollen, I am not sure if he has gill infection from the LFS

 

[fishorama]

So far so good with your plants.

I don't see black gills on your betta...