I am a first time bonsai owner trying to rescue a juniper bonsai that has begun yellowing and become brittle. I can't put him outside--I live in a NYC apartment--so I have been misting him, using 10-10-10 fertilizer, and even collecting rainwater to water him with, but he's still looking so sad. Anything I can do to perk him up? And is this yellowing a sign of overwatering or underwatering? When I inherited the tree from my boyfriend, he'd been watering once a week, which seemed too infrequent because the tree had already begun becoming brittle, but I'm not sure if my more frequent watering is helping or hurting.