Barney's Critical Kush is very good strain - sure you will enjoy it, Also DNA is a very good breeder and all strain are very good along with Barney's. Be sure to keep us infomer !!
Plants look very healthy. Obviously you know what you're doing or just read a lot like me. I really don't see any flaws you got a nice grow going there Should come to a good yield n some nice bud shots. Just keep em happy. I would figure out something for pests. Best to have something in place before you have any. I made a lot of mistakes but pulling through them.
What nutes are you running and in soil?
Whatever it is seems to be working real good.