Much more info is needed. I’d start with your environmental factors such as temp and humidity. Then you’ll know why they are doing this. If the conditions are too dry they’ll use much more water, same a the human body. And the opposite is true if the conditions are not dry enough. VPD is important. Get to know it and dial in your environment accordingly to compensate. Too wet and your plants won’t transpire properly and uptake nutrients. Too dry and they’ll transpire too much and nutrient rich soil or feedings can easily burn the roots and plant vegetation. Start with your environment and go from there.
