Left the pump running to long?

[BattleBong]

Hey guys,
Have just started my first grow every thing has been going well running a basic hydro system with a pump and gullys. I am currently running my 6 new babies (clones) at 18-6 and watering for 15 mins every 3 hours during light hours. I just noticed that our pump has been running for at least the last couple of hours, this means they have been getting watered for the last 3-4 hours. I'm really concerned about nutrient burning and nutrient lock out is there anything I can do at this stage? The leaves are already showing signs of burning.

 

[Bush Dr]

Run water through to reduce the concentration

 

[Lammy]

Hey guys,
Have just started my first grow every thing has been going well running a basic hydro system with a pump and gullys. I am currently running my 6 new babies (clones) at 18-6 and watering for 15 mins every 3 hours during light hours. I just noticed that our pump has been running for at least the last couple of hours, this means they have been getting watered for the last 3-4 hours. I'm really concerned about nutrient burning and nutrient lock out is there anything I can do at this stage? The leaves are already showing signs of burning.

I'm not familiar with a "basic hydro system with a pump and gullys".
But the different hydro systems that I have used, running them constantly would not cause nute burn. At least not with the nutrients that I use. For the most part if enough oxygen gets to the roots I don't think to you can over water. so the roots might just need a little air if not you could try flushing your plants.
But its probably not that big of a deal they'll bounce back.

 

[CannaBunkerMan]

A lot of people with drip hydro sysytems will leave their feed pump on 24/7. This can cause a water temperature rise, so unless you have a water chiller you shouldn't try this. I'm used to a 30 second on/15 minute off cycle.