*repost with all info* potential light burn?

Hi guys, noticed these white/yellow/brown marks on the leaves. Can't quite figure out what's caused it

Anyone seen this before and know what it is?

It has come through in the past two days

I have a par reader, no light is over 1500umol (either between 950-1250) and I run co2

Is it possible to still get light burn?

Feeding house and garden range (coco)

EC of feeding is 2 (use cana calmag to harden the water prior to adding A&B due to soft water)

Room temp 30c & humidity is sitting around 60%

Co2 ppm 1400-1500

pH of feeding is 5.8

Have done a few grows the exact same and never had this type of issue before

You said soft water. Do you have a water softener?

PadawanWarrior said:

You said soft water. Do you have a water softener?

Click to expand...

No our standard water that comes out of the tap is soft (doesn't register any ppm on the bluelab truncheon meter)