Hi, I have some problems with my bonsai and i hope you'll be able to give me some advice. I was given a Zelkova bonsai for my birthday and it was bought in a mall. I know that usually such bonsais aren't really healthy but it seemed nice and I got it as a gift so I didn't pay much attention to that. I placed it indoors and watered it and the next day I examined it a bit and i saw that some leaves are turning light green and then yellow and then their tips just become dry and dark green. At the end they jist fall off ... I removed such leaves immediately and I checked the soil just to make sure that I didn't overwatered it. The soil seemed fine but still i've decided not to water the bonsai until the soil dries out a bit. I haven't watered my bonsai for 7 days now but leaves are still drying out. I am not sure what's going on so i am asking you for help. Also it's not just old leaves that are drying out and falling off but also newly grown shoots are becoming dry and dark green. Is this some kind of disease and if so do you think healing foliar spray will help? Thanks in advance