My Papa passed away on the 4th. I took an Ivy and a big plant. I just found out today it was a Peace lily. I have been reading up on them. So far I have read that it likes filtered light, watch for browning of the leaves, and so on. It said something about a fertilizer mix of 20-20-20 on both sites I was reading. What does this mean? How do I do it. Know any good videos? I am a seeing type of learner. How often should I fertilize? One site said once a month and the other said in the spring and the summer. Also, There a little spots on the flowers. Is that normal?