Bonsai of Northern Light Automatic

On day 29 I: - measured the soil acidity and it was very low @ PH 5.5 - washed the soil with a lot of tap water @ PH 7.4 On day 30 I: - measured the acidity again and it was @ PH 5.9 - removed the yellow leaves and the branches growing on the lower side - adjusted the wired to train the plants On day 31 I: - watered the plants with a solution of 7-3-5 NPK + micronutrients + hydrated lime to increase PH