I received a 20 gallon tank a few days ago. I currently have a 10 gallon that is planted. I have 20 lb. of eco-complete in the 10 gallon, what can I get to supplement this when I move to the larger tank? Also, when I first received my plants, many of them like my melon sword and crypt and another sword all melted and are just starting to come back after a couple months. What can I do to prevent this from happening again?