Hello! Since a few days both of my plants started to get these spots and one also these strange lines. It is just like on 2/3 leaves on each plants and mostly just one round spot. Well except one plant that has this leaf.

This leaf or the spots on it felt dry and crumbly like two days ago but now it feels normal again.

If it matters it is an f1 orion autoflower and started to bloom like a week ago. From looking around the internet it might be the pH value of the water, but i am not sure. I followed the fertilisation plan from the manufacturer. Except i took a little less. Both soil (light mix) and fertiliser (grow and bloom) are from biobizz. Or maybe they missing something, since the retailer told me the soil is prefertilsed for around four weeks and well they are exactly five weeks old now since they came above ground.

Would be nice if anyone could help me! Thanks in advance! :)