Good morning from NJ. We purchased a new home that has a small pond about 2' deep in center with 2 shelves, one on each side. I have never owned a pond and the wife originally wanted to remove it. While the wife and I were on our first kidless vacation in 12 years my family was kind enough to clean it out (it was full of algae and leaves and crud due to the previous owners neglecting it). We discovered it had a pump and waterfall which I got working. Everyone loves it and now the kids want to add a few fish but I am cautious as I want to do this correctly and being in NJ we do get below freezing weather. As you can see from the photos it is a bit green, is this normal? There are 2 plants, still in buckets on the shelves and I need to learn exactly how the heck to maintain this and what plants and animals if any I can add, and will I need additional equipment. Thanks!!