Water consumption. How much water do your plants drink?

I started my first hydro grow with an ebb and flow rail system. I've completed 5 weeks in the system so far: 4 weeks of veg and finishing up the first week of flowering. All the plants are healthier than ever!

So, how much water do your plants drink? I check the water level every day, and usually i have to add at least 2 gallons and sometimes 3 gallons every 2 days....so the plants are soaking up about a gallon a day. If i leave the system running during the entire light cycle I have to add 3 gallons every 2 days. Otherwise I'll water it for an hour every 3 hours. I have aerator stones, so I'm not worried about drowning them, plus they are all healthy, so over watering isn't a problem.

Are these plants just insanely thirsty, or am I losing a lot of water due to evaporation? The temperature in the room usually hovers between 80 and 88 degrees F, and the humidity is around 50%.
 
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Here's a pic I took about 2 hours ago. 3 in the front are white widow, the back left is purple haze, and the tall one on the back right is Kandy Kush
 
In late flower my 15 plants take 10-15 gallons a day.

Are you fucking with me...... every day. I am new to hydro and running a 27 plant table (flood n drain) and my res only holds 100L (about 30 gallon). Your telling me they are gonna gulp almost half that every day in late flower. I am only vegging 1 wk from clone.
 
Are you fucking with me...... every day. I am new to hydro and running a 27 plant table (flood n drain) and my res only holds 100L (about 30 gallon). Your telling me they are gonna gulp almost half that every day in late flower. I am only vegging 1 wk from clone.

I wouldn't fuck with you about that. I veg longer then that but under T5's right now. So my finish size is 3-4 feet tall.
 
I too am new to hydro and I can confirm, these mother fuckers drink a good 1-2 gallons a day easy. I really noticed it first week of flower. Plants are like 2-3 feet and bushy. So They are on the large side, but I am amazed at the amount of water they uptake. its crazy:)
 
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The first pic is the start of week 2 in the hydro unit. The next 5 I took today. These are now about to complete their 2nd week of flowering. No buds yet, but the plants have doubled in size since I first switched over to 12/12 lighting.
 
Looks nice, but the canopy could be a little more even.
Try to take clones evenly and take 2x the amount you need so you can pick the best ones , but you probably already knew that.
 
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