Nitrogen lock out

Hey guy am i on the correct path regarding my plant health? this was the only plant out of 8 doing the claw thing. Im useing 50/50 coco perlite. ph level 5.8.

Basicall i phd 5 litres of water with a drop of superthrive to flush the plant. Next few days will be crucial in recovery. I have noticed now another plant is developing this claw on the leaf. Im 4 weeks into grow. i do have temperature problems with heat atm. awaiting new cold intake.

basically am i on the correct track? should i flush all the plants though due to salt build up and was my flushing correct (superthrive and ph 5.8 water)

The claw is often caused by too much nitrogen or overwatering. If the vegetation is very dark green I would lean towards too much nitrogen.

Back off fertilizers, your flush will have likely helped to decrease nitrogen levels.

Thank you sir. Yes leave are dark green so i was ob the correct path. yes i cut back on Cal-Mag and nutes .starting to read my plants now as its my 3rd go at this growing.