Auto assassin went limp overnight

Using bubbletronics, have autoflowering, 3 Dr. Feelgood & 3 Auto assassins in 27 liter container. Ph is 5.6 Temp is 80. all the plants are healthy and green. They are 2 weeks old. One plant overnight went limp and druppy still green. Why are the other plants still healthy? Any ideas would be thankful. also, need help loading my pics to site from IPHONE?

i think you need the rui app to upload from an i-phone. Im growing like 50 autos right now all different and all in soil, like 3-4 of mine did the same thing, pretty sure it wasnt over watered but almost 100% sure the ph was a bit too high. it was one of the two. is it too hot/close to the light. some of the auto's dont like a big change in day and nite temps. They all get a droppy look when the lights are off and it takes some 2 hrs to perk up after the light comes back on.

shouldn't the ph of hydro be higher then 5.6? or at least im pretty sure haha im a veteran soil grower so i might not know.

5.5-5.8....this will obviously vary my strain. Fine tuning will take some time and lots of patience.

If it's wilted and not an overwater droop then check roots for browning and look for signs of damp off (dark, pinched area at base of trunk - fatal)

you need to enable full site not mobile than you zoom into your reply bar click the picture beside the web and the video strip and upload from there .

This is an odd situation. PH in hydro should be between 5.4 - 6.2. 5.8 is perfect and optimal for nute uptake

Look to the roots, otherwize keep an eye on your overnight temps, a droop is a shock ....of some type