Using Co2 with hydro

[Kblack]

I'm growing DWC in a sealed grow box. I have recently notice the plants are using more water & co2. Do anyone know if this is normal in the second week of flowering?

[rigman]

Sounds normal to me. I would expect to use more water and CO2 as the put on flower weight.

[rigman]

also you should expect a surge in growth the first few weeks of going into flower

[Schmokin]

Hey Kblack. Welcome.
How do you know the plants are using more CO2?