Dying plants for unknown reason

[Fumseca]

Hello,

I recently started to grow. We got 11 plants on flowering stage and everything was going fine until all of a sudden, a lot of leaves started to curl upwards and die. We also had 50+ clones that also died and after analyzing all the possibilities, we can only think about a work done on the water pipes and that the glue used on these pipes, might have damaged them severely after we watered them because the problem started just after this. We are looking for a solution because 5 of these plants are still dying and we don’t know what else to do. We flushed them already, decreased light intensity, cut dead leaves, and the problem remains. The other 6 plants seems to be OK, a little damaged but still alive and strong. If somebody could share some advise to save them we would really appreciate it. I’ll attach some pictures for reference.

Thanks

[MagicMike66]

Look on the main gwe site for diagnosing sick plants. I’d also suggest to get your set up dialled in before you decide to try grow a shit load of plants. It’ll save you a lot of hassle and effort. Good luck

[growell]

have u tried repotting mate

[MeEasy]

You might be right with the water because it's all of them, but check real good for bugs

[OldManGrower]

What is the PH of your water? This looks like a PH issue to me. How close to the lights are the plants? 22 inches seems to work well for a lot of people. Your pots are way too small You need about three gallon pots.

[Farmbuck]

PH seems to be the issue here.

[smoorman]

Check the ph of runoff water also.