justsmoking
Active Member
Ok I have a question about how high can I set my ppm co2 monitor? I had a cheaper hydro innovations model that didn't work right so instead of waiting for them to fix it I bought a better monitor that goes as high as 5000 ppm's where as the other was only as high as 1500 ppm and would come on when below 1200 ppm's . This new one is digital and I set my high and lows. So what can you tell me because this is my first time with co2 and my plants are perfect.