Opinions on my first Aeroponics grow?

This is my first aeroponics grow. I'm growing in a sealed room with a 600 watt HID.

I just noticed today that my fastest growing plant has just started to show signs of the tips burning. I have a full journal documenting everything step by step at https://www.rollitup.org/grow-journals/487154-blue-mystic-house-garden-600-a.html

I was running 1/4 strength nutrients at 300-320ppm for the first 5 days and today I just up'd the ppm's to 400ppm as the plants seemed to be loving it. Today after changing the rez I noticed the slight tip burn.

Should I be concerned? I'm assuming I can simply add more water to dilute the nutrients if the problem persists correct?

Anyways, here are some pics at 5 days old.. any comments etc.. are welcome! Maybe I'm just being paranoid?

all looks ok give them some time before you start to worry about anything they are so tiny still an ec of about 0.4-0.6 would be ok for a seedling
don't give them anymore food they need very little food at this stage

skunkd0c said:

all looks ok give them some time before you start to worry about anything they are so tiny still an ec of about 0.4-0.6 would be ok for a seedling
don't give them anymore food they need very little food at this stage

Click to expand...

Okay thanks.. yeah I'm running 380-400ppm now (about .6 ec) and had no plans to increase for at least another week and a half.

I run my ppm at 225 to 250 with no tip burn. They sure like that fresh water.