27.4.//Definitely those flying bugs were Fungus gnats. The soil was infected even I bought it in the store. So I had to use the insecticide which I'll attach as a photo; There is great natural replacement for this poison - Neem oil mixed with Hydrogen peroxide but unfortunately I couldn't find pure Neem oil in my country.
2.5.
//plants are looking healthy and beautiful. Each plant has a fourth tier of leafs; Each plant is 5cm tall.
4.5.//finally I've got two more lights and now each plant is covered by 100w led light; Humidity began to rise as the plants also began to grow and humidity reached 62%;