Буду гровером-пусть меня научат)

Hi! So, what I can say, at first look, there is nothing critical. But if we speak about PPM so I suggest the following: water your plants heavily so that you finally could measure drainage (min. half of liter is enough) - you'll see the problem at once. If the drainage solution is heavy brown - that's the abundance of the nutrients. If the drainage solution is light - then you need to increase your feeding. Anyway according to your last comment you should water once again with pure water and make a new solution. RM for example is a heavy eater and she eats a lot. So she will be glad to get more fertilizers.