what seems to be a problem?

6.1 pH is too low for soil. I think it's calcium deficiency caused by the low pH.

Check for mites.

I'm with @chemistry. Remove a few leaves and check with your loupe.

Guys I have. It is clean! No mites.

More then less I think that ph was to low for these kind of soil (biobizz light mix). First I make 5.9. Today I make 6.3. Lets see what will be at the end. I used REMO. But as much I know advance perfect ph stuff is 5.7 and it plays perfect! Now I dont understand?
It is also first time that I use these kind of soil.

chemistry said:

Check for mites.

Click to expand...

If there was a mite, then more then less we will be seeing white spots not brown. But thx. for tip.