My plants are demonstrating a symptom that their leaves become transparents. There only 2 species with this problem in my tank that are hemianthus micranthemoides and didiplis diandra. I'm injecting a good quantity of CO2 but the CO2 dissolving rate is a little unstable. Sometimes my needle valve discalibrates and inject less CO2 than the normal that are more than 90 ppm in my tank. I turn on the gas 4 hour before the lights on and turn it off 3 hours before the lights off. I'm doing it properly? Thank you.